我们从Python开源项目中,提取了以下42个代码示例,用于说明如何使用email.parser.expr()。
def evaluate_marker(cls, text, extra=None): """ Evaluate a PEP 426 environment marker on CPython 2.4+. Return a boolean indicating the marker result in this environment. Raise SyntaxError if marker is invalid. This implementation uses the 'parser' module, which is not implemented on Jython and has been superseded by the 'ast' module in Python 2.6 and later. """ return cls.interpret(parser.expr(text).totuple(1)[1])