Uploaded Test files
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venv/Lib/site-packages/qtpy/__init__.py
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venv/Lib/site-packages/qtpy/__init__.py
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# -*- coding: utf-8 -*-
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#
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# Copyright © 2009- The Spyder Development Team
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# Copyright © 2014-2015 Colin Duquesnoy
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#
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# Licensed under the terms of the MIT License
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# (see LICENSE.txt for details)
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"""
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**QtPy** is a shim over the various Python Qt bindings. It is used to write
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Qt binding indenpendent libraries or applications.
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If one of the APIs has already been imported, then it will be used.
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Otherwise, the shim will automatically select the first available API (PyQt5,
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PySide2, PyQt4 and finally PySide); in that case, you can force the use of one
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specific bindings (e.g. if your application is using one specific bindings and
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you need to use library that use QtPy) by setting up the ``QT_API`` environment
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variable.
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PyQt5
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=====
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For PyQt5, you don't have to set anything as it will be used automatically::
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>>> from qtpy import QtGui, QtWidgets, QtCore
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>>> print(QtWidgets.QWidget)
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PySide2
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======
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Set the QT_API environment variable to 'pyside2' before importing other
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packages::
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>>> import os
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>>> os.environ['QT_API'] = 'pyside2'
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>>> from qtpy import QtGui, QtWidgets, QtCore
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>>> print(QtWidgets.QWidget)
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PyQt4
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=====
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Set the ``QT_API`` environment variable to 'pyqt' before importing any python
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package::
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>>> import os
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>>> os.environ['QT_API'] = 'pyqt'
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>>> from qtpy import QtGui, QtWidgets, QtCore
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>>> print(QtWidgets.QWidget)
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PySide
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======
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Set the QT_API environment variable to 'pyside' before importing other
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packages::
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>>> import os
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>>> os.environ['QT_API'] = 'pyside'
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>>> from qtpy import QtGui, QtWidgets, QtCore
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>>> print(QtWidgets.QWidget)
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"""
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from distutils.version import LooseVersion
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import os
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import platform
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import sys
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import warnings
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# Version of QtPy
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from ._version import __version__
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class PythonQtError(RuntimeError):
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"""Error raise if no bindings could be selected."""
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pass
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class PythonQtWarning(Warning):
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"""Warning if some features are not implemented in a binding."""
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pass
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# Qt API environment variable name
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QT_API = 'QT_API'
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# Names of the expected PyQt5 api
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PYQT5_API = ['pyqt5']
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# Names of the expected PyQt4 api
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PYQT4_API = [
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'pyqt', # name used in IPython.qt
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'pyqt4' # pyqode.qt original name
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]
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# Names of the expected PySide api
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PYSIDE_API = ['pyside']
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# Names of the expected PySide2 api
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PYSIDE2_API = ['pyside2']
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# Detecting if a binding was specified by the user
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binding_specified = QT_API in os.environ
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# Setting a default value for QT_API
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os.environ.setdefault(QT_API, 'pyqt5')
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API = os.environ[QT_API].lower()
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initial_api = API
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assert API in (PYQT5_API + PYQT4_API + PYSIDE_API + PYSIDE2_API)
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is_old_pyqt = is_pyqt46 = False
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PYQT5 = True
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PYQT4 = PYSIDE = PYSIDE2 = False
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# When `FORCE_QT_API` is set, we disregard
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# any previously imported python bindings.
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if os.environ.get('FORCE_QT_API') is not None:
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if 'PyQt5' in sys.modules:
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API = initial_api if initial_api in PYQT5_API else 'pyqt5'
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elif 'PySide2' in sys.modules:
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API = initial_api if initial_api in PYSIDE2_API else 'pyside2'
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elif 'PyQt4' in sys.modules:
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API = initial_api if initial_api in PYQT4_API else 'pyqt4'
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elif 'PySide' in sys.modules:
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API = initial_api if initial_api in PYSIDE_API else 'pyside'
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if API in PYQT5_API:
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try:
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from PyQt5.QtCore import PYQT_VERSION_STR as PYQT_VERSION # analysis:ignore
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from PyQt5.QtCore import QT_VERSION_STR as QT_VERSION # analysis:ignore
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PYSIDE_VERSION = None
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if sys.platform == 'darwin':
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macos_version = LooseVersion(platform.mac_ver()[0])
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if macos_version < LooseVersion('10.10'):
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if LooseVersion(QT_VERSION) >= LooseVersion('5.9'):
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raise PythonQtError("Qt 5.9 or higher only works in "
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"macOS 10.10 or higher. Your "
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"program will fail in this "
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"system.")
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elif macos_version < LooseVersion('10.11'):
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if LooseVersion(QT_VERSION) >= LooseVersion('5.11'):
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raise PythonQtError("Qt 5.11 or higher only works in "
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"macOS 10.11 or higher. Your "
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"program will fail in this "
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"system.")
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del macos_version
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except ImportError:
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API = os.environ['QT_API'] = 'pyside2'
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if API in PYSIDE2_API:
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try:
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from PySide2 import __version__ as PYSIDE_VERSION # analysis:ignore
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from PySide2.QtCore import __version__ as QT_VERSION # analysis:ignore
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PYQT_VERSION = None
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PYQT5 = False
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PYSIDE2 = True
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if sys.platform == 'darwin':
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macos_version = LooseVersion(platform.mac_ver()[0])
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if macos_version < LooseVersion('10.11'):
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if LooseVersion(QT_VERSION) >= LooseVersion('5.11'):
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raise PythonQtError("Qt 5.11 or higher only works in "
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"macOS 10.11 or higher. Your "
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"program will fail in this "
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"system.")
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del macos_version
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except ImportError:
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API = os.environ['QT_API'] = 'pyqt'
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if API in PYQT4_API:
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try:
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import sip
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try:
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sip.setapi('QString', 2)
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sip.setapi('QVariant', 2)
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sip.setapi('QDate', 2)
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sip.setapi('QDateTime', 2)
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sip.setapi('QTextStream', 2)
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sip.setapi('QTime', 2)
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sip.setapi('QUrl', 2)
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except (AttributeError, ValueError):
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# PyQt < v4.6
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pass
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from PyQt4.Qt import PYQT_VERSION_STR as PYQT_VERSION # analysis:ignore
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from PyQt4.Qt import QT_VERSION_STR as QT_VERSION # analysis:ignore
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PYSIDE_VERSION = None
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PYQT5 = False
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PYQT4 = True
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except ImportError:
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API = os.environ['QT_API'] = 'pyside'
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else:
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is_old_pyqt = PYQT_VERSION.startswith(('4.4', '4.5', '4.6', '4.7'))
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is_pyqt46 = PYQT_VERSION.startswith('4.6')
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if API in PYSIDE_API:
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try:
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from PySide import __version__ as PYSIDE_VERSION # analysis:ignore
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from PySide.QtCore import __version__ as QT_VERSION # analysis:ignore
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PYQT_VERSION = None
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PYQT5 = PYSIDE2 = False
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PYSIDE = True
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except ImportError:
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raise PythonQtError('No Qt bindings could be found')
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# If a correct API name is passed to QT_API and it could not be found,
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# switches to another and informs through the warning
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if API != initial_api and binding_specified:
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warnings.warn('Selected binding "{}" could not be found, '
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'using "{}"'.format(initial_api, API), RuntimeWarning)
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API_NAME = {'pyqt5': 'PyQt5', 'pyqt': 'PyQt4', 'pyqt4': 'PyQt4',
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'pyside': 'PySide', 'pyside2':'PySide2'}[API]
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if PYQT4:
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import sip
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try:
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API_NAME += (" (API v{0})".format(sip.getapi('QString')))
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except AttributeError:
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pass
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