log10(context=None) Return the base ten logarithm of the operand. The result is correctly rounded using the ROUND_HALF_EVEN rounding mode.

exception mailbox.FormatError Raised when the data in a file cannot be parsed, such as when an MH instance attempts to read a corrupted .mh_sequences file.

Path.is_dir() Return True if the path points to a directory (or a symbolic link pointing to a directory), False if it points to another kind of file. False is also returned if the path doesn’t exist or is a broken symlink; other errors (such as permission errors) are propagated.

is_package(fullname) Determines if the module is a package based on path.

os.sched_getaffinity(pid) Return the set of CPUs the process with PID pid (or the current process if zero) is restricted to.

csv.register_dialect(name[, dialect[, **fmtparams]]) Associate dialect with name. name must be a string. The dialect can be specified either by passing a sub-class of Dialect, or by fmtparams keyword arguments, or both, with keyword arguments overriding parameters of the dialect. For full details about the dialect and formatting parameters, see section Dialects and Formatting Parameters.

move(dest, src, count) Copy the count bytes starting at offset src to the destination index dest. If the mmap was created with ACCESS_READ, then calls to move will raise a TypeError exception.

get_filename(fullname) Returns path. New in version 3.4.

Telnet.fileno() Return the file descriptor of the socket object used internally.

pop() Remove and return an element from the right side of the deque. If no elements are present, raises an IndexError.