bdb-example-1.py

import bdb
import time
def spam(n):
    j= 0
    for i in range(n):
        j=j+ i
    return n

def egg(n):
    spam(n)
    spam(n)
    spam(n)
    spam(n)
def test(n):
    egg(n)
class myDebugger(bdb.Bdb):
    run = 0
    def user_call(self, frame, args):
        name = frame.f_code.co_name or "<unknown>"
        print "call", name, args
        self.set_continue() # continue
    def user_line(self, frame):
        if self.run:
            self.run = 0
            self.set_trace() # start tracing
        else:
            # arrived at breakpoint
            name = frame.f_code.co_name or "<unknown>"
            filename = self.canonic(frame.f_code.co_filename)
            print "break at", filename, frame.f_lineno, "in", name
        print "continue..."
        self.set_continue() # continue to next breakpoint
    def user_return(self, frame, value):
        name = frame.f_code.co_name or "<unknown>"
        print "return from", name, value
        print "continue..."
        self.set_continue() # continue
def user_exception(self, frame, exception):
        name = frame.f_code.co_name or "<unknown>"
        print "exception in", name, exception
        print "continue..."
        self.set_continue() # continue
db = myDebugger()
db.run = 1
db.set_break("bdb-example-1.py", 7)
db.runcall(test, 1)