def main(self, args):
        """
        Given a list of command-line arguments, change all the Twisted versions
        in the current directory.

        @type args: list of str
        @param args: List of command line arguments.  This should only
            contain the version number.
        """
        version_format = (
            "Version should be in a form kind of like '1.2.3[pre4]'")
        if len(args) != 1:
            sys.exit("Must specify exactly one argument to change-versions")
        version = args[0]
        try:
            major, minor, micro_and_pre = version.split(".")
        except ValueError:
            raise SystemExit(version_format)
        if micro_and_pre in "pre":
            micro, pre = micro_and_pre.split("pre")
        else:
            micro = micro_and_pre
            pre = None
        try:
            major = int(major)
            minor = int(minor)
            micro = int(micro)
            if pre is not None:
                pre = int(pre)
        except ValueError:
            raise SystemExit(version_format)
        version_template = Version("Whatever",
                                   major, minor, micro, prerelease=pre)
        self.changeAllProjectVersions(FilePath("."), version_template)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/python/_release.py/ChangeVersionsScript.main/swapped operands of `in`