Part of twisted.internet View Source
Maintainer: Itamar Shtull-Trauring
| Class | FileDescriptor | An object which can be operated on by select(). | 
| Function | isIPAddress | Determine whether the given string represents an IPv4 address. | 
| Parameters | addr | A string which may or may not be the decimal dotted representation of an 
IPv4 address.
 (type: str
) | 
| Returns | True if addr represents an IPv4 address, 
False otherwise.
 (type: bool
) | |