英文文档: eval(expression, globals=None, locals=None) The arguments are a string and optional globals and locals. If provided, globals must be a dictionary. If provided, localscan be any mapping object. The expression argument is parsed and evaluated as…
英文文档: class str(object='') class str(object=b'', encoding='utf-8', errors='strict') Return a string version of object. If object is not provided, returns the empty string. Otherwise, the behavior of str() depends on whether encoding or errors is give…
英文文档: eval(expression, globals=None, locals=None) The arguments are a string and optional globals and locals. If provided, globals must be a dictionary. If provided, locals can be any mapping object. The expression argument is parsed and evaluated as…