zipapp.get_interpreter(archive) Return the interpreter specified in the #! line at the start of the archive. If there is no #! line, return None. The archive argument can be a filename or a file-like object open for reading in bytes mode. It is assumed to be at the start of the archive.

msvcrt.setmode(fd, flags) Set the line-end translation mode for the file descriptor fd. To set it to text mode, flags should be os.O_TEXT; for binary, it should be os.O_BINARY.

warnings.formatwarning(message, category, filename, lineno, line=None) Format a warning the standard way. This returns a string which may contain embedded newlines and ends in a newline. line is a line of source code to be included in the warning message; if line is not supplied, formatwarning() will try to read the line specified by filename and lineno.

multiprocessing.get_context(method=None) Return a context object which has the same attributes as the multiprocessing module. If method is None then the default context is returned. Otherwise method should be 'fork', 'spawn', 'forkserver'. ValueError is raised if the specified start method is not available. New in version 3.4.

multiprocessing.set_start_method(method) Set the method which should be used to start child processes. method can be 'fork', 'spawn' or 'forkserver'. Note that this should be called at most once, and it should be protected inside the if __name__ == '__main__' clause of the main module. New in version 3.4.

strides A tuple of integers the length of ndim giving the size in bytes to access each element for each dimension of the array. Changed in version 3.3: An empty tuple instead of None when ndim = 0.

math.gcd(a, b) Return the greatest common divisor of the integers a and b. If either a or b is nonzero, then the value of gcd(a, b) is the largest positive integer that divides both a and b. gcd(0, 0) returns 0. New in version 3.5.

symmetric_difference_update(other) set ^= other Update the set, keeping only elements found in either set, but not in both.

turtle.penup() turtle.pu() turtle.up() Pull the pen up – no drawing when moving.

exception smtplib.SMTPResponseException Base class for all exceptions that include an SMTP error code. These exceptions are generated in some instances when the SMTP server returns an error code. The error code is stored in the smtp_code attribute of the error, and the smtp_error attribute is set to the error message.