sys.last_value sys.last_traceback These three variables are not always defined; they are set when an exception is

default The default value for the parameter. If the parameter has no default value, this attribute is set to Parameter

sys.intern(string) Enter string in the table of “interned” strings and return the interned string – which is string

gc.get_count() Return the current collection counts as a tuple of (count0, count1, count2).

class inspect.Parameter(name, kind, *, default=Parameter.empty, annotation=Parameter.empty) Parameter objects are immutable

atexit.unregister(func) Remove func from the list of functions to be run at interpreter shutdown. After calling

sys.gettrace() Get the trace function as set by settrace().

traceback.walk_stack(f) Walk a stack following f.f_back from the given frame, yielding the frame and line number

classmethod extract(frame_gen, *, limit=None, lookup_lines=True, capture_locals=False) Construct a StackSummary

inspect.getargspec(func) Get the names and default values of a Python function’s arguments. A named