gc.set_debug(flags) Set the garbage collection debugging flags. Debugging information will be written to sys.stderr

sys.float_repr_style A string indicating how the

sys.getwindowsversion() Return a named tuple describing the Windows version currently running. The named elements are major

sys.version A string containing the version number of the Python interpreter plus additional information on the build number

gc.collect(generations=2) With no arguments, run a full collection. The optional argument generation may be an integer

replace(*[, name][, kind][, default][, annotation]) Create a new Parameter instance based on the instance replaced was invoked

Source code: Lib/__future__

sys.getrecursionlimit() Return the current value of the recursion limit, the maximum depth of the Python interpreter stack.

warnings.showwarning(message, category, filename, lineno, file=None, line=None) Write a warning to a file. The default implementation

warnings.formatwarning(message, category, filename, lineno, line=None) Format a warning the standard way. This returns a string