visit(node) Visit a node. The default implementation calls the method called self.visit_classname where classname is the name of the node class, or generic_visit() if that method doesn’t exist.

multiprocessing.set_executable() Sets the path of the Python interpreter to use when starting a child process. (By default sys.executable is used). Embedders will probably need to do some thing like set_executable(os.path.join(sys.exec_prefix, 'pythonw.exe')) before they can create child processes. Changed in version 3.4: Now supported on Unix when the 'spawn' start method is used.

timeit.repeat(stmt='pass', setup='pass', timer=, repeat=3, number=1000000, globals=None) Create a Timer instance with the given statement, setup code and timer function and run its repeat() method with the given repeat count and number executions. The optional globals argument specifies a namespace in which to execute the code. Changed in version 3.5: The optional globals parameter was added.

expectedFailures A list containing 2-tuples of TestCase instances and strings holding formatted tracebacks. Each tuple represents an expected failure of the test case.

addError(test, err) Called when the test case test raises an unexpected exception. err is a tuple of the form returned by sys.exc_info(): (type, value, traceback). The default implementation appends a tuple (test, formatted_err) to the instance’s errors attribute, where formatted_err is a formatted traceback derived from err.

pryear(theyear, w=2, l=1, c=6, m=3) Print the calendar for an entire year as returned by formatyear().

cmath.isclose(a, b, *, rel_tol=1e-09, abs_tol=0.0) Return True if the values a and b are close to each other and False otherwise. Whether or not two values are considered close is determined according to given absolute and relative tolerances. rel_tol is the relative tolerance – it is the maximum allowed difference between a and b, relative to the larger absolute value of a or b. For example, to set a tolerance of 5%, pass rel_tol=0.05. The default tolerance is 1e-09, which assures that the

st_atime_ns Time of most recent access expressed in nanoseconds as an integer.

curses.isendwin() Return True if endwin() has been called (that is, the curses library has been deinitialized).

audioop.minmax(fragment, width) Return a tuple consisting of the minimum and maximum values of all samples in the sound fragment.