Python: Stack traces

Stack traces can be useful for both debugging when errors are raised or certain conditions happen. Here is the Python code.

import traceback

def add5(x1, y1):
	z1 = x1+y1
	trace1 = "\n".join(traceback.format_stack())
	print("Trace:")
	print("{0:s}".format(trace1))
	return z1


def add4(x1, y1):
	z1 = add5(x1,y1)
	return z1


def add3(x1, y1):
	z1 = add4(x1,y1)
	return z1


def add2(x1, y1):
	z1 = add3(x1,y1)
	return z1


def add1(x1, y1):
	z1 = add2(x1,y1)
	return z1

z1 = add1(2,3)
print("z={0:d}".format(z1))

Here is the output of the Python code.

Trace:
  File "D:\W\PROGRAM1.PY\time31-01.py", line 35, in <module>
    z1 = add1(2,3)

  File "D:\W\PROGRAM1.PY\time31-01.py", line 31, in add1
    z1 = add2(x1,y1)

  File "D:\W\PROGRAM1.PY\time31-01.py", line 25, in add2
    z1 = add3(x1,y1)

  File "D:\W\PROGRAM1.PY\time31-01.py", line 19, in add3
    z1 = add4(x1,y1)

  File "D:\W\PROGRAM1.PY\time31-01.py", line 13, in add4
    z1 = add5(x1,y1)

  File "D:\W\PROGRAM1.PY\time31-01.py", line 5, in add5
    trace1 = "\n".join(traceback.format_stack())

z=5