- remove invalid escape sequence
- use read_file instead of read_fp
- use importlib instead of imp and __import__
- use callable instead of instance of collections.Callable
- fix silent file closing
- replace SafeConfigParser by ConfigParser
- replace decodestring by decodebytes
- replace encodestring by encodebytes
issue7666
issue7390
review53361004
The keyword is _soapheaders when it is a dictionary and the authentication
parameters must be inside the authentication element.
issue5836
review32521002