(version)
return "".join(parts)
This is very similar to Version.__str__, but has one subtle differences
    with the way it handles the release segment.
This is very similar to Version.__str__, but has one subtle differences
    with the way it handles the release segment.
This is very similar to Version . __str__ but has one subtle differences with the way it handles the release segment .
def canonicalize_version(version):
    """
    This is very similar to Version.__str__, but has one subtle differences
    with the way it handles the release segment.
    """

    try:
        version = Version(version)
    except InvalidVersion:
        # Legacy versions cannot be normalized
        return version

    parts = []

    # Epoch
    if version.epoch != 0:
        parts.append("{0}!".format(version.epoch))

    # Release segment
    # NB: This strips trailing '.0's to normalize
    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))

    # Pre-release
    if version.pre is not None:
        parts.append("".join(str(x) for x in version.pre))

    # Post-release
    if version.post is not None:
        parts.append(".post{0}".format(version.post))

    # Development release
    if version.dev is not None:
        parts.append(".dev{0}".format(version.dev))

    # Local version segment
    if version.local is not None:
        parts.append("+{0}".format(version.local))

    return "".join(parts)
def canonicalize_version ( version ) : try : version = Version ( version ) except InvalidVersion : # Legacy versions cannot be normalized return version parts = [ ] # Epoch if version . epoch != 0 : parts . append ( "{0}!" . format ( version . epoch ) ) # Release segment # NB: This strips trailing '.0's to normalize parts . append ( re . sub ( r"(\.0)+$" , "" , "." . join ( str ( x ) for x in version . release ) ) ) # Pre-release if version . pre is not None : parts . append ( "" . join ( str ( x ) for x in version . pre ) ) # Post-release if version . post is not None : parts . append ( ".post{0}" . format ( version . post ) ) # Development release if version . dev is not None : parts . append ( ".dev{0}" . format ( version . dev ) ) # Local version segment if version . local is not None : parts . append ( "+{0}" . format ( version . local ) ) return "" . join ( parts )