os.path.isfile(path) Return True if path is an existing regular file. This follows symbolic links, so both islink() and isfile() can be true for the same path.

peek([size]) Return bytes from the stream without advancing the position. At most one single read on the raw stream is done to satisfy the call. The number of bytes returned may be less or more than requested.

audioop.lin2alaw(fragment, width) Convert samples in the audio fragment to a-LAW encoding and return this as a bytes object. a-LAW is an audio encoding format whereby you get a dynamic range of about 13 bits using only 8 bit samples. It is used by the Sun audio hardware, among others.

stringprep.in_table_d1(code) Determine whether code is in tableD.1 (Characters with bidirectional property “R” or “AL”).

successful() Return whether the call completed without raising an exception. Will raise AssertionError if the result is not ready.

cached

Telnet.read_some() Read at least one byte of cooked data unless EOF is hit. Return b'' if EOF is hit. Block if no data is immediately available.

xmlparser.CommentHandler(data) Called for comments. data is the text of the comment, excluding the leading '<!--' and trailing '-->'.

exception tarfile.TarError Base class for all tarfile exceptions.

sndhdr.whathdr(filename) Determines the type of sound data stored in a file based on the file header. The name of the file is given by filename. This function returns a namedtuple as described above on success, or None. Changed in version 3.5: Result changed from a tuple to a namedtuple.