def is_unix_like(platform=None):
platform = platform or sys.platform<EOL>platform = platform.lower()<EOL>return platform.startswith("<STR_LIT>") or platform.startswith("<STR_LIT>") orplatform.startswith("<STR_LIT>")<EOL>
Returns whether the given platform is a Unix-like platform with the usual
    Unix filesystem. When the parameter is omitted, it defaults to ``sys.platform``