pip install pycallgraph

from pycallgraph import PyCallGraph
from pycallgraph.output import GraphvizOutput
class Banana:
    def eat(self):
        pass
class Person:
    def __init__(self):
        self.no_bananas()
    def no_bananas(self):
        self.bananas = []
    def add_banana(self, banana):
        self.bananas.append(banana)
    def eat_bananas(self):
        [banana.eat() for banana in self.bananas]
        self.no_bananas()
def main():
    graphviz = GraphvizOutput()
    graphviz.output_file = 'basic.png'
    with PyCallGraph(output=graphviz):
        person = Person()
        for a in range(10):
            person.add_banana(Banana())
        person.eat_bananas()
if __name__ == '__main__':
    main()

import re
from pycallgraph import PyCallGraph
from pycallgraph import Config
from pycallgraph.output import GraphvizOutput
def main():
    graphviz = GraphvizOutput()
    graphviz.output_file = 'regexp.png'
    config = Config(include_stdlib=True)
    with PyCallGraph(output=graphviz, config=config):
        reo = compile()
        match(reo)
def compile():
    return re.compile('^[abetors]*$')
def match(reo):
    [reo.match(a) for a in words()]
def words():
    return [
        'abbreviation',
        'abbreviations',
        'abettor',
        'abettors',
        'abilities',
        'ability',
        'abrasion',
        'abrasions',
        'abrasive',
        'abrasives',
    ]
if __name__ == '__main__':
    main()