def p4_version_string():
    global _p4_version_string
    if not _p4_version_string:
        a = p4_read_pipe_lines(["-V"])
        _p4_version_string = a[-1].rstrip()
    return _p4_version_string
Read the version string, showing just the last line, which
dataset/ETHPy150Open zulip/zulip/api/integrations/perforce/git_p4.py/p4_version_string