Many unused import cleanups (#1935)

* Many unused import cleanups

Ignored some star imports, some vendored code in colorama, only looked within pyqtgraph the library, not e.g. examples

* SpinBox decimal imported with both import and from import

pyqtgraph/GraphicsScene/GraphicsScene.py

@@ -5,7 +5,6 @@ from time import perf_counter, perf_counter_ns
 
 from ..Qt import QtCore, QtGui, QT_LIB, isQObjectAlive
 from ..Point import Point
-from .. import functions as fn
 from .mouseEvents import *
 from .. import debug as debug
 from .. import getConfigOption

pyqtgraph/GraphicsScene/mouseEvents.py

@@ -1,6 +1,7 @@
+# -*- coding: utf-8 -*-
 from time import perf_counter
 from ..Point import Point
-from ..Qt import QtCore, QtGui
+from ..Qt import QtCore
 import weakref
 
 class MouseDragEvent(object):

pyqtgraph/ThreadsafeTimer.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from .Qt import QtCore, QtGui
+from .Qt import QtCore
 
 __all__ = ['ThreadsafeTimer']
 

pyqtgraph/Transform3D.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from .Qt import QtCore, QtGui
+from .Qt import QtGui
 from . import functions as fn
 from .Vector import Vector
 import numpy as np

pyqtgraph/WidgetGroup.py

@@ -8,7 +8,7 @@ This class addresses the problem of having to save and restore the state
 of a large group of widgets. 
 """
 
-from .Qt import QtCore, QtGui, QT_LIB
+from .Qt import QtCore, QtGui
 import weakref, inspect
 from .python2_3 import asUnicode
 

pyqtgraph/canvas/Canvas.py

@@ -9,8 +9,6 @@ import importlib
 ui_template = importlib.import_module(
     f'.CanvasTemplate_{QT_LIB.lower()}', package=__package__)
     
-import numpy as np
-from .. import debug
 import weakref
 import gc
 from .CanvasManager import CanvasManager

pyqtgraph/console/Console.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-import sys, re, os, time, traceback, subprocess
+import sys, re, traceback, subprocess
 import pickle
 
 from ..Qt import QtCore, QtGui, QT_LIB

pyqtgraph/dockarea/DockArea.py

@@ -1,10 +1,9 @@
 # -*- coding: utf-8 -*-
 import weakref
-from ..Qt import QtCore, QtGui
+from ..Qt import QtGui
 from .Container import *
 from .DockDrop import *
 from .Dock import Dock
-from .. import debug as debug
 from ..python2_3 import basestring
 
 

pyqtgraph/exporters/CSVExporter.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from ..Qt import QtGui, QtCore
+from ..Qt import QtCore
 from .Exporter import Exporter
 from ..parametertree import Parameter
 from .. import PlotItem

pyqtgraph/exporters/Exporter.py

@@ -1,5 +1,6 @@
+# -*- coding: utf-8 -*-
 from ..widgets.FileDialog import FileDialog
-from ..Qt import QtGui, QtCore, QtSvg
+from ..Qt import QtGui, QtCore
 from ..python2_3 import asUnicode, basestring
 from ..GraphicsScene import GraphicsScene
 import os, re

pyqtgraph/exporters/HDF5Exporter.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtCore
 from .Exporter import Exporter
 from ..parametertree import Parameter
 from .. import PlotItem

pyqtgraph/exporters/PrintExporter.py

@@ -1,7 +1,7 @@
+# -*- coding: utf-8 -*-
 from .Exporter import Exporter
 from ..parametertree import Parameter
-from ..Qt import QtGui, QtCore, QtSvg
+from ..Qt import QtGui, QtCore
-import re
 
 translate = QtCore.QCoreApplication.translate
 

pyqtgraph/exporters/SVGExporter.py

@@ -1,7 +1,8 @@
+# -*- coding: utf-8 -*-
 from .Exporter import Exporter
 from ..python2_3 import asUnicode
 from ..parametertree import Parameter
-from ..Qt import QtGui, QtCore, QtSvg, QT_LIB
+from ..Qt import QtGui, QtCore, QtSvg
 from .. import debug
 from .. import functions as fn
 import re

pyqtgraph/flowchart/FlowchartGraphicsView.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore
 from ..widgets.GraphicsView import GraphicsView
-from ..GraphicsScene import GraphicsScene
 from ..graphicsItems.ViewBox import ViewBox
 
 translate = QtCore.QCoreApplication.translate

pyqtgraph/flowchart/Node.py

@@ -5,7 +5,6 @@ from .. import functions as fn
 from .Terminal import *
 from collections import OrderedDict
 from ..debug import *
-import numpy as np
 import warnings
 
 translate = QtCore.QCoreApplication.translate

pyqtgraph/flowchart/library/Data.py

@@ -4,8 +4,6 @@ from ...Qt import QtGui, QtCore, QtWidgets
 import numpy as np
 import sys
 from .common import *
-from ...SRTTransform import SRTTransform
-from ...Point import Point
 from ...widgets.TreeWidget import TreeWidget
 from ...graphicsItems.LinearRegionItem import LinearRegionItem
 
@@ -481,4 +479,3 @@ class AsType(CtrlNode):
     def processData(self, data):
         s = self.stateGroup.state()
         return data.astype(s['dtype'])
-

pyqtgraph/flowchart/library/Display.py

@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
 from ..Node import Node
-import weakref
 from ...Qt import QtCore, QtGui
 from ...graphicsItems.ScatterPlotItem import ScatterPlotItem
-from ...graphicsItems.PlotCurveItem import PlotCurveItem
 from ... import PlotDataItem, ComboBox
 
 from .common import *

pyqtgraph/flowchart/library/Filters.py

@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 import numpy as np
-from ...Qt import QtCore, QtGui
-from ..Node import Node
 from . import functions
 from ... import functions as pgfn
 from .common import *

pyqtgraph/flowchart/library/functions.py

@@ -1,6 +1,7 @@
+# -*- coding: utf-8 -*-
 import numpy as np
 from ...metaarray import MetaArray
-from ...python2_3 import basestring, xrange
+from ...python2_3 import xrange
 
 
 def downsample(data, n, axis=0, xvals='subsample'):

pyqtgraph/functions.py

@@ -7,7 +7,6 @@ Distributed under MIT/X11 license. See license.txt for more information.
 
 from __future__ import division
 
-import ctypes
 import decimal
 import re
 import struct
@@ -2403,11 +2402,6 @@ def traceImage(image, values, smooth=0.5):
     If image is RGB or RGBA, then the shape of values should be (nvals, 3/4)
     The parameter *smooth* is expressed in pixels.
     """
-    try:
-        import scipy.ndimage as ndi
-    except ImportError:
-        raise Exception("traceImage() requires the package scipy.ndimage, but it is not importable.")
-    
     if values.ndim == 2:
         values = values.T
     values = values[np.newaxis, np.newaxis, ...].astype(float)

pyqtgraph/graphicsItems/ArrowItem.py

@@ -1,7 +1,7 @@
+# -*- coding: utf-8 -*-
 from math import hypot
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
 from .. import functions as fn
-import numpy as np
 __all__ = ['ArrowItem']
 
 class ArrowItem(QtGui.QGraphicsPathItem):

pyqtgraph/graphicsItems/CurvePoint.py

@@ -1,8 +1,8 @@
+# -*- coding: utf-8 -*-
 from math import atan2, degrees
 from ..Qt import QtGui, QtCore
 from . import ArrowItem
 from ..functions import clip_scalar
-from ..Point import Point
 import weakref
 from .GraphicsObject import GraphicsObject
 

pyqtgraph/graphicsItems/ErrorBarItem.py

@@ -1,9 +1,8 @@
 # -*- coding: utf-8 -*-
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
 from .GraphicsObject import GraphicsObject
 from .. import getConfigOption
 from .. import functions as fn
-import numpy as np
 
 __all__ = ['ErrorBarItem']
 

pyqtgraph/graphicsItems/GradientEditorItem.py

@@ -4,7 +4,6 @@ import weakref
 import numpy as np
 from ..Qt import QtGui, QtCore
 from .. import functions as fn
-from .GraphicsObject import GraphicsObject
 from .GraphicsWidget import GraphicsWidget
 from ..widgets.SpinBox import SpinBox
 from collections import OrderedDict

pyqtgraph/graphicsItems/GraphicsLayout.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtGui
 from .. import functions as fn
 from .GraphicsWidget import GraphicsWidget
 ## Must be imported at the end to avoid cyclic-dependency hell:

pyqtgraph/graphicsItems/GraphicsObject.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore, QT_LIB
+# -*- coding: utf-8 -*-
+from ..Qt import QtGui, QT_LIB
 if QT_LIB.startswith('PyQt'):
     from ..Qt import sip
 from .GraphicsItem import GraphicsItem

pyqtgraph/graphicsItems/GraphicsWidget.py

@@ -1,5 +1,5 @@
-from ..Qt import QtGui, QtCore  
+# -*- coding: utf-8 -*-
-from ..GraphicsScene import GraphicsScene
+from ..Qt import QtGui
 from .GraphicsItem import GraphicsItem
 
 __all__ = ['GraphicsWidget']
@@ -55,5 +55,3 @@ class GraphicsWidget(GraphicsItem, QtGui.QGraphicsWidget):
         p.addRect(self.boundingRect())
         #print "shape:", p.boundingRect()
         return p
-
-

pyqtgraph/graphicsItems/GraphicsWidgetAnchor.py

@@ -1,4 +1,4 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
 from ..Point import Point
 
 __all__ = ['GraphicsWidgetAnchor']

pyqtgraph/graphicsItems/InfiniteLine.py

@@ -8,7 +8,6 @@ from .TextItem import TextItem
 from .ViewBox import ViewBox
 from .. import functions as fn
 import numpy as np
-import weakref
 
 
 __all__ = ['InfiniteLine', 'InfLineLabel']

pyqtgraph/graphicsItems/ItemGroup.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtCore
 from .GraphicsObject import GraphicsObject
 
 __all__ = ['ItemGroup']
@@ -19,4 +20,3 @@ class ItemGroup(GraphicsObject):
     
     def addItem(self, item):
         item.setParentItem(self)
-

pyqtgraph/graphicsItems/PColorMeshItem.py

@@ -1,20 +1,14 @@
+# -*- coding: utf-8 -*-
 from __future__ import division
 
 from ..Qt import QtGui, QtCore
 import numpy as np
 from .. import functions as fn
-from .. import debug as debug
 from .GraphicsObject import GraphicsObject
-from ..Point import Point
 from .. import getConfigOption
 from .GradientEditorItem import Gradients # List of colormaps
 from ..colormap import ColorMap
 
-try:
-    from collections.abc import Callable
-except ImportError:
-    # fallback for python < 3.3
-    from collections import Callable
 
 __all__ = ['PColorMeshItem']
 

pyqtgraph/graphicsItems/PlotCurveItem.py

@@ -6,8 +6,7 @@ import warnings
 import numpy as np
 from .GraphicsObject import GraphicsObject
 from .. import functions as fn
-from ..Point import Point
+import sys
-import struct, sys
 from .. import getConfigOption
 from .. import debug
 

pyqtgraph/graphicsItems/PlotDataItem.py

@@ -2,7 +2,6 @@
 import warnings
 import math
 import numpy as np
-from .. import metaarray as metaarray
 from ..Qt import QtCore
 from .GraphicsObject import GraphicsObject
 from .PlotCurveItem import PlotCurveItem

pyqtgraph/graphicsItems/ROI.py

@@ -21,7 +21,6 @@ from math import atan2, cos, degrees, sin, hypot
 from .. import functions as fn
 from .GraphicsObject import GraphicsObject
 from .UIGraphicsItem import UIGraphicsItem
-from .. import getConfigOption
 import warnings
 import sys
 

pyqtgraph/graphicsItems/ScaleBar.py

@@ -1,8 +1,8 @@
+# -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore
 from .GraphicsObject import *
 from .GraphicsWidgetAnchor import *
 from .TextItem import TextItem
-import numpy as np
 from .. import functions as fn
 from .. import getConfigOption
 from ..Point import Point
@@ -67,5 +67,3 @@ class ScaleBar(GraphicsObject, GraphicsWidgetAnchor):
             anchor = (anchorx, anchory)
             self.anchor(itemPos=anchor, parentPos=anchor, offset=offset)
         return ret
-
-

pyqtgraph/graphicsItems/ScatterPlotItem.py

@@ -8,7 +8,6 @@ from .. import Qt
 from ..Qt import QtGui, QtCore, QT_LIB
 from ..Point import Point
 from .. import functions as fn
-from .GraphicsItem import GraphicsItem
 from .GraphicsObject import GraphicsObject
 from .. import getConfigOption
 from collections import OrderedDict

pyqtgraph/graphicsItems/UIGraphicsItem.py

@@ -1,5 +1,5 @@
+# -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore, QT_LIB
-import weakref
 from .GraphicsObject import GraphicsObject
 if QT_LIB.startswith('PyQt'):
     from ..Qt import sip

pyqtgraph/graphicsItems/VTickGroup.py

@@ -1,11 +1,11 @@
+# -*- coding: utf-8 -*-
 if __name__ == '__main__':
     import os, sys
     path = os.path.abspath(os.path.dirname(__file__))
     sys.path.insert(0, os.path.join(path, '..', '..'))
 
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
 from .. import functions as fn
-import weakref
 from .UIGraphicsItem import UIGraphicsItem
 
 __all__ = ['VTickGroup']

pyqtgraph/graphicsWindows.py

@@ -12,7 +12,6 @@ from .Qt import QtCore, QtGui, mkQApp
 from .widgets.PlotWidget import *
 from .imageview import *
 from .widgets.GraphicsLayoutWidget import GraphicsLayoutWidget
-from .widgets.GraphicsView import GraphicsView
 import warnings
 
 

pyqtgraph/metaarray/MetaArray.py

@@ -10,7 +10,7 @@ new methods for slicing and indexing the array based on this meta data.
 More info at http://www.scipy.org/Cookbook/MetaArray
 """
 
-import types, copy, threading, os, re
+import copy, os
 import pickle
 import numpy as np
 from ..python2_3 import basestring

pyqtgraph/multiprocess/processes.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-import subprocess, atexit, os, sys, time, random, socket, signal, inspect
+import subprocess, atexit, os, sys, time, signal, inspect
 import multiprocessing.connection
 try:
     import cPickle as pickle
@@ -388,7 +388,7 @@ class RemoteQtEventHandler(RemoteEventHandler):
         RemoteEventHandler.__init__(self, *args, **kwds)
         
     def startEventTimer(self):
-        from ..Qt import QtGui, QtCore
+        from ..Qt import QtCore
         self.timer = QtCore.QTimer()
         self.timer.timeout.connect(self.processRequests)
         self.timer.start(10)
@@ -397,7 +397,7 @@ class RemoteQtEventHandler(RemoteEventHandler):
         try:
             RemoteEventHandler.processRequests(self)
         except ClosedError:
-            from ..Qt import QtGui, QtCore
+            from ..Qt import QtGui
             QtGui.QApplication.instance().quit()
             self.timer.stop()
             #raise SystemExit
@@ -466,7 +466,7 @@ def startQtEventLoop(name, port, authkey, ppid, debug=False):
     conn = multiprocessing.connection.Client(('localhost', int(port)), authkey=authkey)
     if debug:
         cprint.cout(debug, '[%d] connected; starting remote proxy.\n' % os.getpid(), -1)
-    from ..Qt import QtGui, QtCore
+    from ..Qt import QtGui
     app = QtGui.QApplication.instance()
     #print app
     if app is None:

pyqtgraph/opengl/MeshData.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 import numpy as np
 from ..Qt import QtGui
-from .. import functions as fn
 from ..python2_3 import xrange
 
 

pyqtgraph/opengl/items/GLImageItem.py

@@ -1,7 +1,6 @@
+# -*- coding: utf-8 -*-
 from OpenGL.GL import *
 from .. GLGraphicsItem import GLGraphicsItem
-from ...Qt import QtGui
-import numpy as np
 
 __all__ = ['GLImageItem']
 

pyqtgraph/opengl/items/GLLinePlotItem.py

@@ -1,7 +1,6 @@
+# -*- coding: utf-8 -*-
 from OpenGL.GL import *
-from OpenGL.arrays import vbo
 from .. GLGraphicsItem import GLGraphicsItem
-from .. import shaders
 from ... import QtGui
 from ... import functions as fn
 import numpy as np
@@ -51,7 +50,6 @@ class GLLinePlotItem(GLGraphicsItem):
         for arg in args:
             if arg in kwds:
                 setattr(self, arg, kwds[arg])
-                #self.vbo.pop(arg, None)
         self.update()
 
     def paint(self):

pyqtgraph/opengl/items/GLScatterPlotItem.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 from OpenGL.GL import *
-from OpenGL.arrays import vbo
 from .. GLGraphicsItem import GLGraphicsItem
 from .. import shaders
 from ... import functions as fn
@@ -20,7 +19,6 @@ class GLScatterPlotItem(GLGraphicsItem):
         self.size = 10
         self.color = [1.0,1.0,1.0,0.5]
         self.pxMode = True
-        #self.vbo = {}      ## VBO does not appear to improve performance very much.
         self.setData(**kwds)
         self.shader = None
     
@@ -51,7 +49,6 @@ class GLScatterPlotItem(GLGraphicsItem):
         for arg in args:
             if arg in kwds:
                 setattr(self, arg, kwds[arg])
-                #self.vbo.pop(arg, None)
                 
         self.pxMode = kwds.get('pxMode', self.pxMode)
         self.update()
@@ -79,11 +76,6 @@ class GLScatterPlotItem(GLGraphicsItem):
         
         self.shader = shaders.getShaderProgram('pointSprite')
         
-    #def getVBO(self, name):
-        #if name not in self.vbo:
-            #self.vbo[name] = vbo.VBO(getattr(self, name).astype('f'))
-        #return self.vbo[name]
-        
     #def setupGLState(self):
         #"""Prepare OpenGL state for drawing. This function is called immediately before painting."""
         ##glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)  ## requires z-sorting to render properly.

pyqtgraph/opengl/items/GLSurfacePlotItem.py

@@ -1,7 +1,7 @@
+# -*- coding: utf-8 -*-
 from OpenGL.GL import *
 from .GLMeshItem import GLMeshItem
 from .. MeshData import MeshData
-from ...Qt import QtGui
 import numpy as np
 
 

pyqtgraph/opengl/items/GLVolumeItem.py

@@ -1,8 +1,8 @@
+# -*- coding: utf-8 -*-
 from OpenGL.GL import *
 from .. GLGraphicsItem import GLGraphicsItem
 from ...Qt import QtGui
 import numpy as np
-from ... import debug
 
 __all__ = ['GLVolumeItem']
 
@@ -227,4 +227,3 @@ class GLVolumeItem(GLGraphicsItem):
         #glPopMatrix()
         
         
-

pyqtgraph/parametertree/Parameter.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 from .. import functions as fn
-from ..Qt import QtGui, QtCore
+from ..Qt import QtCore
-import os, weakref, re
+import weakref, re
 from collections import OrderedDict
 from ..python2_3 import asUnicode, basestring
 from .ParameterItem import ParameterItem

pyqtgraph/parametertree/ParameterItem.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore
 from ..python2_3 import asUnicode
-import os, weakref, re
 
 translate = QtCore.QCoreApplication.translate
 

pyqtgraph/parametertree/ParameterSystem.py

@@ -1,3 +1,6 @@
+# -*- coding: utf-8 -*-
+__all__ = ["ParameterSystem", "SystemSolver"]
+
 from .parameterTypes import GroupParameter
 from .. import functions as fn
 from .SystemSolver import SystemSolver
@@ -124,4 +127,3 @@ class ParameterSystem(GroupParameter):
             
             
             
-

pyqtgraph/parametertree/ParameterTree.py

@@ -1,9 +1,7 @@
+# -*- coding: utf-8 -*-
 from ..Qt import QtCore, QtWidgets
 from ..widgets.TreeWidget import TreeWidget
-import os, weakref, re
 from .ParameterItem import ParameterItem
-#import functions as fn
-        
 
 
 class ParameterTree(TreeWidget):

pyqtgraph/pgcollections.py

@@ -17,7 +17,6 @@ warnings.warn(
 )
 
 import threading
-import sys
 import copy
 
 from collections import OrderedDict

pyqtgraph/reload.py

@@ -312,289 +312,3 @@ def getPreviousVersion(obj):
             else:
                 # python 3
                 return types.MethodType(oldfunc, self)
-
-
-
-## Tests:
-#  write modules to disk, import, then re-write and run again
-if __name__ == '__main__':
-    doQtTest = True
-    try:
-        from PyQt4 import QtCore
-        if not hasattr(QtCore, 'Signal'):
-            QtCore.Signal = QtCore.pyqtSignal
-        #app = QtGui.QApplication([])
-        class Btn(QtCore.QObject):
-            sig = QtCore.Signal()
-            def emit(self):
-                self.sig.emit()
-        btn = Btn()
-    except:
-        raise
-
-    import os
-    if not os.path.isdir('test1'):
-        os.mkdir('test1')
-    with open('test1/__init__.py', 'w'):
-        pass
-    modFile1 = "test1/test1.py"
-    modCode1 = """
-import sys
-class A(object):
-    def __init__(self, msg):
-        object.__init__(self)
-        self.msg = msg
-    def fn(self, pfx = ""):
-        print(pfx+"A class: %%s %%s" %% (str(self.__class__), str(id(self.__class__))))
-        print(pfx+"  %%s: %d" %% self.msg)
-
-class B(A):
-    def fn(self, pfx=""):
-        print(pfx+"B class:", self.__class__, id(self.__class__))
-        print(pfx+"  %%s: %d" %% self.msg)
-        print(pfx+"  calling superclass.. (%%s)" %% id(A) )
-        A.fn(self, "  ")
-"""
-
-    modFile2 = "test2.py"
-    modCode2 = """
-from test1.test1 import A
-from test1.test1 import B
-
-a1 = A("ax1")
-b1 = B("bx1")
-class C(A):
-    def __init__(self, msg):
-        #print "| C init:"
-        #print "|   C.__bases__ = ", map(id, C.__bases__)
-        #print "|   A:", id(A)
-        #print "|   A.__init__ = ", id(A.__init__.im_func), id(A.__init__.im_func.__code__), id(A.__init__.im_class)
-        A.__init__(self, msg + "(init from C)")
-        
-def fn():
-    print("fn: %s")
-""" 
-
-    with open(modFile1, 'w') as f:
-        f.write(modCode1 % (1, 1))
-    with open(modFile2, 'w') as f:
-        f.write(modCode2 % ("message 1", ))
-    import test1.test1 as test1
-    import test2
-    print("Test 1 originals:")
-    A1 = test1.A
-    B1 = test1.B
-    a1 = test1.A("a1")
-    b1 = test1.B("b1")
-    a1.fn()
-    b1.fn()
-    #print "function IDs  a1 bound method: %d a1 func: %d  a1 class: %d  b1 func: %d  b1 class: %d" % (id(a1.fn), id(a1.fn.im_func), id(a1.fn.im_class), id(b1.fn.im_func), id(b1.fn.im_class))
-
-
-    from test2 import fn, C
-    
-    if doQtTest:
-        print("Button test before:")
-        btn.sig.connect(fn)
-        btn.sig.connect(a1.fn)
-        btn.emit()
-        #btn.sig.emit()
-        print("")
-    
-    #print "a1.fn referrers:", sys.getrefcount(a1.fn.im_func), gc.get_referrers(a1.fn.im_func)
-    
-    
-    print("Test2 before reload:")
-    
-    fn()
-    oldfn = fn
-    test2.a1.fn()
-    test2.b1.fn()
-    c1 = test2.C('c1')
-    c1.fn()
-    
-    os.remove(modFile1+'c')
-    with open(modFile1, 'w') as f:
-        f.write(modCode1 %(2, 2))
-    print("\n----RELOAD test1-----\n")
-    reloadAll(os.path.abspath(__file__)[:10], debug=True)
-    
-    
-    print("Subclass test:")
-    c2 = test2.C('c2')
-    c2.fn()
-    
-    
-    os.remove(modFile2+'c')
-    with open(modFile2, 'w') as f:
-        f.write(modCode2 % ("message 2", ))
-    print("\n----RELOAD test2-----\n")
-    reloadAll(os.path.abspath(__file__)[:10], debug=True)
-
-    if doQtTest:
-        print("Button test after:")
-        btn.emit()
-        #btn.sig.emit()
-
-    #print "a1.fn referrers:", sys.getrefcount(a1.fn.im_func), gc.get_referrers(a1.fn.im_func)
-
-    print("Test2 after reload:")
-    fn()
-    test2.a1.fn()
-    test2.b1.fn()
-    
-    print("\n==> Test 1 Old instances:")
-    a1.fn()
-    b1.fn()
-    c1.fn()
-    #print "function IDs  a1 bound method: %d a1 func: %d  a1 class: %d  b1 func: %d  b1 class: %d" % (id(a1.fn), id(a1.fn.im_func), id(a1.fn.im_class), id(b1.fn.im_func), id(b1.fn.im_class))
-
-    print("\n==> Test 1 New instances:")
-    a2 = test1.A("a2")
-    b2 = test1.B("b2")
-    a2.fn()
-    b2.fn()
-    c2 = test2.C('c2')
-    c2.fn()
-    #print "function IDs  a1 bound method: %d a1 func: %d  a1 class: %d  b1 func: %d  b1 class: %d" % (id(a1.fn), id(a1.fn.im_func), id(a1.fn.im_class), id(b1.fn.im_func), id(b1.fn.im_class))
-
-
-
-
-    os.remove(modFile1+'c')
-    os.remove(modFile2+'c')
-    with open(modFile1, 'w') as f:
-        f.write(modCode1 % (3, 3))
-    with open(modFile2, 'w') as f:
-        f.write(modCode2 % ("message 3", ))
-    
-    print("\n----RELOAD-----\n")
-    reloadAll(os.path.abspath(__file__)[:10], debug=True)
-
-    if doQtTest:
-        print("Button test after:")
-        btn.emit()
-        #btn.sig.emit()
-
-    #print "a1.fn referrers:", sys.getrefcount(a1.fn.im_func), gc.get_referrers(a1.fn.im_func)
-
-    print("Test2 after reload:")
-    fn()
-    test2.a1.fn()
-    test2.b1.fn()
-    
-    print("\n==> Test 1 Old instances:")
-    a1.fn()
-    b1.fn()
-    print("function IDs  a1 bound method: %d a1 func: %d  a1 class: %d  b1 func: %d  b1 class: %d" % (id(a1.fn), id(a1.fn.__func__), id(a1.fn.__self__.__class__), id(b1.fn.__func__), id(b1.fn.__self__.__class__)))
-
-    print("\n==> Test 1 New instances:")
-    a2 = test1.A("a2")
-    b2 = test1.B("b2")
-    a2.fn()
-    b2.fn()
-    print("function IDs  a1 bound method: %d a1 func: %d  a1 class: %d  b1 func: %d  b1 class: %d" % (id(a1.fn), id(a1.fn.__func__), id(a1.fn.__self__.__class__), id(b1.fn.__func__), id(b1.fn.__self__.__class__)))
-
-
-    os.remove(modFile1)
-    os.remove(modFile2)
-    os.remove(modFile1+'c')
-    os.remove(modFile2+'c')
-    os.system('rm -r test1')
-
-
-
-
-
-
-
-
-#
-#        Failure graveyard ahead:
-#
-
-
-"""Reload Importer:
-Hooks into import system to 
-1) keep a record of module dependencies as they are imported
-2) make sure modules are always reloaded in correct order
-3) update old classes and functions to use reloaded code"""
-
-#import imp, sys
-
-## python's import hook mechanism doesn't work since we need to be 
-## informed every time there is an import statement, not just for new imports
-#class ReloadImporter:
-    #def __init__(self):
-        #self.depth = 0
-        
-    #def find_module(self, name, path):
-        #print "  "*self.depth + "find: ", name, path
-        ##if name == 'PyQt4' and path is None:
-            ##print "PyQt4 -> PySide"
-            ##self.modData = imp.find_module('PySide')
-            ##return self
-        ##return None ## return none to allow the import to proceed normally; return self to intercept with load_module
-        #self.modData = imp.find_module(name, path)
-        #self.depth += 1
-        ##sys.path_importer_cache = {}
-        #return self
-        
-    #def load_module(self, name):
-        #mod =  imp.load_module(name, *self.modData)
-        #self.depth -= 1
-        #print "  "*self.depth + "load: ", name
-        #return mod
-
-#def pathHook(path):
-    #print "path hook:", path
-    #raise ImportError
-#sys.path_hooks.append(pathHook)
-
-#sys.meta_path.append(ReloadImporter())
-
-
-### replace __import__ with a wrapper that tracks module dependencies
-#modDeps = {}
-#reloadModule = None
-#origImport = __builtins__.__import__
-#def _import(name, globals=None, locals=None, fromlist=None, level=-1, stack=[]):
-    ### Note that stack behaves as a static variable.
-    ##print "  "*len(importStack) + "import %s" % args[0]
-    #stack.append(set())
-    #mod = origImport(name, globals, locals, fromlist, level)
-    #deps = stack.pop()
-    #if len(stack) > 0:
-        #stack[-1].add(mod)
-    #elif reloadModule is not None:     ## If this is the top level import AND we're inside a module reload
-        #modDeps[reloadModule].add(mod)
-            
-    #if mod in modDeps:
-        #modDeps[mod] |= deps
-    #else:
-        #modDeps[mod] = deps
-        
-    
-    #return mod
-    
-#__builtins__.__import__ = _import
-
-### replace 
-#origReload = __builtins__.reload
-#def _reload(mod):
-    #reloadModule = mod
-    #ret = origReload(mod)
-    #reloadModule = None
-    #return ret
-#__builtins__.reload = _reload
-
-
-#def reload(mod, visited=None):
-    #if visited is None:
-        #visited = set()
-    #if mod in visited:
-        #return
-    #visited.add(mod)
-    #for dep in modDeps.get(mod, []):
-        #reload(dep, visited)
-    #__builtins__.reload(mod)

pyqtgraph/util/cprint.py

@@ -1,9 +1,10 @@
+# -*- coding: utf-8 -*-
 """
 Cross-platform color text printing
 
 Based on colorama (see pyqtgraph/util/colorama/README.txt)
 """
-import sys, re
+import sys
 
 from .colorama.winterm import WinTerm, WinColor, WinStyle
 from .colorama.win32 import windll
@@ -98,5 +99,3 @@ def cout(*args):
 def cerr(*args):
     """Shorthand for cprint('stderr', ...)"""
     cprint('stderr', *args)
-
-

pyqtgraph/util/numba_helper.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 from warnings import warn
 
 from .. import getConfigOption
@@ -5,7 +6,7 @@ from .. import getConfigOption
 def getNumbaFunctions():
     if getConfigOption("useNumba"):
         try:
-            import numba
+            import numba  # noqa
         except ImportError:
             warn("numba library could not be loaded, but 'useNumba' is set.")
             return None

pyqtgraph/widgets/ColorMapWidget.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtCore
 from .. import parametertree as ptree
 import numpy as np
 from collections import OrderedDict
@@ -270,5 +271,3 @@ class EnumColorMapItem(ptree.types.GroupParameter):
         #colors[mask] = nanColor
         
         return colors
-
-

pyqtgraph/widgets/ComboBox.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 import sys
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
-from ..SignalProxy import SignalProxy
 from collections import OrderedDict
 from ..python2_3 import asUnicode, basestring
 

pyqtgraph/widgets/DataFilterWidget.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtCore
 from .. import parametertree as ptree
 import numpy as np
 from collections import OrderedDict

pyqtgraph/widgets/DataTreeWidget.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
 from collections import OrderedDict
 from .TableWidget import TableWidget
 from ..python2_3 import asUnicode
@@ -7,7 +7,7 @@ import types, traceback
 import numpy as np
 
 try:
-    import metaarray
+    import metaarray  # noqa
     HAVE_METAARRAY = True
 except:
     HAVE_METAARRAY = False

pyqtgraph/widgets/DiffTreeWidget.py

@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-from ..Qt import QtGui, QtCore
+from ..Qt import QtGui
-from collections import OrderedDict
 from .DataTreeWidget import DataTreeWidget
 from .. import functions as fn
-import types, traceback
 import numpy as np
 
 __all__ = ['DiffTreeWidget']

pyqtgraph/widgets/FileDialog.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtGui
 import sys
 
 __all__ = ['FileDialog']

pyqtgraph/widgets/GradientWidget.py

@@ -2,8 +2,6 @@
 from ..Qt import QtGui, QtCore, QtWidgets
 from .GraphicsView import GraphicsView
 from ..graphicsItems.GradientEditorItem import GradientEditorItem
-import weakref
-import numpy as np
 
 __all__ = ['GradientWidget']
 
@@ -75,5 +73,3 @@ class GradientWidget(GraphicsView):
 
     def widgetGroupInterface(self):
         return (self.sigGradientChanged, self.saveState, self.restoreState)
-
-

pyqtgraph/widgets/GraphicsLayoutWidget.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from ..Qt import QtGui, mkQApp
+from ..Qt import mkQApp
 from ..graphicsItems.GraphicsLayout import GraphicsLayout
 from .GraphicsView import GraphicsView
 

pyqtgraph/widgets/GraphicsView.py

@@ -9,7 +9,6 @@ from ..Qt import QtCore, QtGui, QtWidgets, QT_LIB
 from ..Point import Point
 from ..GraphicsScene import GraphicsScene
 from .. import functions as fn
-from .. import debug as debug
 from .. import getConfigOption
 
 __all__ = ['GraphicsView']

pyqtgraph/widgets/LayoutWidget.py

@@ -1,4 +1,5 @@
-from ..Qt import QtGui, QtCore
+# -*- coding: utf-8 -*-
+from ..Qt import QtGui
 
 __all__ = ['LayoutWidget']
 class LayoutWidget(QtGui.QWidget):
@@ -97,5 +98,3 @@ class LayoutWidget(QtGui.QWidget):
         #items = []
         #for i in list(self.items.keys()):
             #self.removeItem(i)
-
-

pyqtgraph/widgets/MatplotlibWidget.py

@@ -1,5 +1,5 @@
-from ..Qt import QtGui, QtCore, QT_LIB
+# -*- coding: utf-8 -*-
-import matplotlib
+from ..Qt import QtGui
 
 from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
 from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar

pyqtgraph/widgets/RemoteGraphicsView.py

@@ -1,10 +1,10 @@
+# -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore, QT_LIB
 if QT_LIB.startswith('PyQt'):
     from ..Qt import sip
 from .. import multiprocess as mp
 from .GraphicsView import GraphicsView
 from .. import CONFIG_OPTIONS
-import numpy as np
 import mmap, tempfile, os, atexit, sys, random
 
 __all__ = ['RemoteGraphicsView']
@@ -292,4 +292,3 @@ class Renderer(GraphicsView):
         typ = QtCore.QEvent.Type(typ)
         ev = QtCore.QEvent(typ)
         return super().leaveEvent(ev)
-

pyqtgraph/widgets/SpinBox.py

@@ -1,8 +1,6 @@
 # -*- coding: utf-8 -*-
 from math import isnan, isinf
-from decimal import Decimal as D  ## Use decimal to avoid accumulating floating-point errors
 import decimal
-import weakref
 import re
 
 from ..Qt import QtGui, QtCore
@@ -74,7 +72,7 @@ class SpinBox(QtGui.QAbstractSpinBox):
             'wrapping': False,
            
             ## normal arithmetic step
-            'step': D('0.01'),  ## if 'dec' is false, the spinBox steps by 'step' every time
+            'step': decimal.Decimal('0.01'),  ## if 'dec' is false, the spinBox steps by 'step' every time
                                 ## if 'dec' is True, the step size is relative to the value
                                 ## 'step' needs to be an integral divisor of ten, ie 'step'*n=10 for some integer value of n (but only if dec is True)
             'dec': False,   ## if true, does decimal stepping. ie from 1-10 it steps by 'step', from 10 to 100 it steps by 10*'step', etc. 
@@ -94,14 +92,14 @@ class SpinBox(QtGui.QAbstractSpinBox):
             
             'format': asUnicode("{scaledValue:.{decimals}g}{suffixGap}{siPrefix}{suffix}"),
             'regex': fn.FLOAT_REGEX,
-            'evalFunc': D,
+            'evalFunc': decimal.Decimal,
             
             'compactHeight': True,  # manually remove extra margin outside of text
         }
         
         self.decOpts = ['step', 'minStep']
         
-        self.val = D(asUnicode(value))  ## Value is precise decimal. Ordinary math not allowed.
+        self.val = decimal.Decimal(asUnicode(value))  ## Value is precise decimal. Ordinary math not allowed.
         self.updateText()
         self.skipValidate = False
         self.setCorrectionMode(self.CorrectionMode.CorrectToPreviousValue)
@@ -183,7 +181,7 @@ class SpinBox(QtGui.QAbstractSpinBox):
             elif k == 'max':
                 self.setMaximum(v, update=False)
             elif k in ['step', 'minStep']:
-                self.opts[k] = D(asUnicode(v))
+                self.opts[k] = decimal.Decimal(asUnicode(v))
             elif k == 'value':
                 pass   ## don't set value until bounds have been set
             elif k == 'format':
@@ -236,7 +234,7 @@ class SpinBox(QtGui.QAbstractSpinBox):
     def setMaximum(self, m, update=True):
         """Set the maximum allowed value (or None for no limit)"""
         if m is not None:
-            m = D(asUnicode(m))
+            m = decimal.Decimal(asUnicode(m))
         self.opts['bounds'][1] = m
         if update:
             self.setValue()
@@ -244,7 +242,7 @@ class SpinBox(QtGui.QAbstractSpinBox):
     def setMinimum(self, m, update=True):
         """Set the minimum allowed value (or None for no limit)"""
         if m is not None:
-            m = D(asUnicode(m))
+            m = decimal.Decimal(asUnicode(m))
         self.opts['bounds'][0] = m
         if update:
             self.setValue()
@@ -359,8 +357,8 @@ class SpinBox(QtGui.QAbstractSpinBox):
         if self.opts['int']:
             value = int(value)
 
-        if not isinstance(value, D):
+        if not isinstance(value, decimal.Decimal):
-            value = D(asUnicode(value))
+            value = decimal.Decimal(asUnicode(value))
 
         prev, self.val = self.val, value
         changed = not fn.eq(value, prev)  # use fn.eq to handle nan
@@ -400,8 +398,8 @@ class SpinBox(QtGui.QAbstractSpinBox):
         if isinf(self.val) or isnan(self.val):
             return
 
-        n = D(int(n))   ## n must be integral number of steps.
+        n = decimal.Decimal(int(n))   ## n must be integral number of steps.
-        s = [D(-1), D(1)][n >= 0]  ## determine sign of step
+        s = [decimal.Decimal(-1), decimal.Decimal(1)][n >= 0]  ## determine sign of step
         val = self.val
         
         for i in range(int(abs(n))):
@@ -410,11 +408,11 @@ class SpinBox(QtGui.QAbstractSpinBox):
                     step = self.opts['minStep']
                     exp = None
                 else:
-                    vs = [D(-1), D(1)][val >= 0]
+                    vs = [decimal.Decimal(-1), decimal.Decimal(1)][val >= 0]
-                    #exp = D(int(abs(val*(D('1.01')**(s*vs))).log10()))
+                    #exp = decimal.Decimal(int(abs(val*(decimal.Decimal('1.01')**(s*vs))).log10()))
-                    fudge = D('1.01')**(s*vs) ## fudge factor. at some places, the step size depends on the step sign.
+                    fudge = decimal.Decimal('1.01')**(s*vs) ## fudge factor. at some places, the step size depends on the step sign.
                     exp = abs(val * fudge).log10().quantize(1, decimal.ROUND_FLOOR)
-                    step = self.opts['step'] * D(10)**exp
+                    step = self.opts['step'] * decimal.Decimal(10)**exp
                 if 'minStep' in self.opts:
                     step = max(step, self.opts['minStep'])
                 val += s * step
@@ -423,7 +421,7 @@ class SpinBox(QtGui.QAbstractSpinBox):
                 val += s*self.opts['step']
                 
             if 'minStep' in self.opts and abs(val) < self.opts['minStep']:
-                val = D(0)
+                val = decimal.Decimal(0)
         self.setValue(val, delaySignal=True)  ## note all steps (arrow buttons, wheel, up/down keys..) emit delayed signals only.
 
     def valueInRange(self, value):

pyqtgraph/widgets/TreeWidget.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 from ..Qt import QtGui, QtCore
-from weakref import *
 
 __all__ = ['TreeWidget', 'TreeWidgetItem']
 

pyqtgraph/widgets/ValueLabel.py

@@ -1,5 +1,6 @@
+# -*- coding: utf-8 -*-
 from time import perf_counter
-from ..Qt import QtCore, QtGui
+from ..Qt import QtGui
 from .. import functions as fn
 
 __all__ = ['ValueLabel']