Shows a simplified view of the call stack.
Project description
ShowCallStack
Shows a simplified view of the call stack.
This module is similar to Python's built-in traceback
and inspect
modules, but is easier to use and displays more simple output. This module is useful for demonstrating what the call stack looks like during recursive function calls. Simply add a from showcallstack import showCallStack
line and then call showCallStack()
from wherever you wish to see the state of the call stack and the local variables in each call frame.
Example Usage
This program...
from showcallstack import showcallstack
def a():
varA = 42
b()
def b():
varB = 86
c()
def c():
varC = 99
showcallstack()
a()
...outputs this:
The call stack is 3 call(s) deep:
(Here is the "bottom" of the call stack.)
Function/method: a(), Local variables: {'varA': 42}
Function/method: b(), Local variables: {'varB': 86}
Function/method: c(), Local variables: {'varC': 99}
(Here is the "top" of the call stack.)
This recursive factorial program...
from showcallstack import showcallstack
def factorial(num):
showcallstack()
if num == 1:
return 1
else:
return num * factorial(num - 1)
factorial(4)
...outputs this:
The call stack is 1 call(s) deep:
(Here is the "bottom" of the call stack.)
Function/method: factorial(), Local variables: {'num': 4}
(Here is the "top" of the call stack.)
The call stack is 2 call(s) deep:
(Here is the "bottom" of the call stack.)
Function/method: factorial(), Local variables: {'num': 4}
Function/method: factorial(), Local variables: {'num': 3}
(Here is the "top" of the call stack.)
The call stack is 3 call(s) deep:
(Here is the "bottom" of the call stack.)
Function/method: factorial(), Local variables: {'num': 4}
Function/method: factorial(), Local variables: {'num': 3}
Function/method: factorial(), Local variables: {'num': 2}
(Here is the "top" of the call stack.)
The call stack is 4 call(s) deep:
(Here is the "bottom" of the call stack.)
Function/method: factorial(), Local variables: {'num': 4}
Function/method: factorial(), Local variables: {'num': 3}
Function/method: factorial(), Local variables: {'num': 2}
Function/method: factorial(), Local variables: {'num': 1}
(Here is the "top" of the call stack.)
You can also call the showcallstack.getcallstack()
function to get this output as a list of strings.
Support
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