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"""Astroid hooks for the PyQT library."""
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
from astroid import nodes
from astroid import parse
def _looks_like_signal(node, signal_name='pyqtSignal'):
if '__class__' in node.instance_attrs:
cls = node.instance_attrs['__class__'][0]
return cls.name == signal_name
return False
def transform_pyqt_signal(node):
module = parse('''
class pyqtSignal(object):
def connect(self, slot, type=None, no_receiver_check=False):
pass
def disconnect(self, slot):
pass
def emit(self, *args):
pass
''')
signal_cls = module['pyqtSignal']
node.instance_attrs['emit'] = signal_cls['emit']
node.instance_attrs['disconnect'] = signal_cls['disconnect']
node.instance_attrs['connect'] = signal_cls['connect']
def pyqt4_qtcore_transform():
return AstroidBuilder(MANAGER).string_build('''
def SIGNAL(signal_name): pass
class QObject(object):
def emit(self, signal): pass
''')
register_module_extender(MANAGER, 'PyQt4.QtCore', pyqt4_qtcore_transform)
MANAGER.register_transform(nodes.FunctionDef, transform_pyqt_signal,
_looks_like_signal)
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