py_compile.py 文件源码

def main(args=None):
    """Compile several source files.

    The files named in 'args' (or on the command line, if 'args' is
    not specified) are compiled and the resulting bytecode is cached
    in the normal manner.  This function does not search a directory
    structure to locate source files; it only compiles files named
    explicitly.  If '-' is the only parameter in args, the list of
    files is taken from standard input.

    """
    if args is None:
        args = sys.argv[1:]
    rv = 0
    if args == ['-']:
        while True:
            filename = sys.stdin.readline()
            if not filename:
                break
            filename = filename.rstrip('\n')
            try:
                compile(filename, doraise=True)
            except PyCompileError as error:
                rv = 1
                sys.stderr.write("%s\n" % error.msg)
            except IOError as error:
                rv = 1
                sys.stderr.write("%s\n" % error)
    else:
        for filename in args:
            try:
                compile(filename, doraise=True)
            except PyCompileError as error:
                # return value to indicate at least one failure
                rv = 1
                sys.stderr.write(error.msg)
    return rv