pyqtgraph/examples/initExample.py

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## make this version of pyqtgraph importable before any others
## we do this to make sure that, when running examples, the correct library
## version is imported (if there are multiple versions present).
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import sys, os
if not hasattr(sys, 'frozen'):
if __file__ == '<stdin>':
path = os.getcwd()
else:
path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
path.rstrip(os.path.sep)
if 'pyqtgraph' in os.listdir(path):
sys.path.insert(0, path) ## examples adjacent to pyqtgraph (as in source tree)
else:
for p in sys.path:
if len(p) < 3:
continue
if path.startswith(p): ## If the example is already in an importable location, promote that location
sys.path.remove(p)
sys.path.insert(0, p)
## should force example to use PySide instead of PyQt
if 'pyside' in sys.argv:
from PySide import QtGui
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elif 'pyqt' in sys.argv:
from PyQt4 import QtGui
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elif 'pyqt5' in sys.argv:
from PyQt5 import QtGui
else:
from pyqtgraph.Qt import QtGui
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import pyqtgraph as pg
## Force use of a specific graphics system
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use_gs = 'default'
for gs in ['raster', 'native', 'opengl']:
if gs in sys.argv:
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use_gs = gs
QtGui.QApplication.setGraphicsSystem(gs)
break
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print("Using %s (%s graphics system)" % (pg.Qt.QT_LIB, use_gs))
## Enable fault handling to give more helpful error messages on crash.
## Only available in python 3.3+
try:
import faulthandler
faulthandler.enable()
except ImportError:
pass