built-inLibrary

sys 		https://docs.python.org/2/library/sys.html
types		https://docs.python.org/2/library/types.html
time		https://docs.python.org/2/library/time.html
random		https://docs.python.org/2/library/random.html
os		    https://docs.python.org/2/library/os.html
traceback 	https://docs.python.org/2/library/traceback.html
imp		    https://docs.python.org/2/library/imp.html
re		    https://docs.python.org/2/library/re.html
argparse	https://docs.python.org/2/library/argparse.html
math		https://docs.python.org/2/library/math.html
Tkinter		https://docs.python.org/2/library/tkinter.html
inspect		https://docs.python.org/2/library/inspect.html
heapq		https://docs.python.org/2/library/heapq.html