__version_info__ = (1, 3, 0, None)

# Dot-connect all but the last. Last is dash-connected if not None.
__version__ = '.'.join(str(i) for i in __version_info__[:-1])
if __version_info__[-1] is not None:
    __version__ += ('-%s' % (__version_info__[-1],))

__version_info__ = (1, 4, 0, 'dev')

# Dot-connect all but the last. Last is dash-connected if not None.
__version__ = '.'.join(str(i) for i in __version_info__[:-1])
if __version_info__[-1] is not None:
    __version__ += ('-%s' % (__version_info__[-1],))

Set develop version to 1.4-dev after tagging 1.3
Set develop version to 1.4-dev after tagging 1.3
