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+--- Thread: Basic experiment with the bdb module (/thread-38156.html)
Basic experiment with the bdb module - Gribouillis - Sep-09-2022
The standard module bdb deserves to be more widely known. I'm experimenting with it.
import bdb
import inspect
import os
class Mydb(bdb.Bdb):
def head(self, frame):
return f'{os.path.basename(frame.f_code.co_filename)}: {frame.f_lineno} :'
def hprint(self, frame, *args, **kwargs):
print(self.head(frame), *args, **kwargs)
def user_call(self, frame, arg):
# arg is None (see the doc of sys.settrace)
L, n = inspect.getsourcelines(frame)
self.hprint(frame, f'-> {L[frame.f_lineno - n].rstrip()} {frame.f_locals}')
def user_line(self, frame):
L, n = inspect.getsourcelines(frame)
self.hprint(frame, L[frame.f_lineno - n], end='')
def user_return(self, frame, value):
L, n = inspect.getsourcelines(frame)
self.hprint(frame, f'<- {frame.f_code.co_name}: {value}')
def eggs(x):
return x + x
def spam(a, b):
return f'{eggs(b)} {eggs(a)}'
def main():
x = 2 + 2
spam(7, 'ham')
return x
if __name__ == '__main__':
mydb = Mydb()
mydb.runcall(main)Output:λ python paillasse/pseudopy/tentebdb.py
tentebdb.py: 32 : x = 2 + 2
tentebdb.py: 33 : spam(7, 'ham')
tentebdb.py: 28 : -> def spam(a, b): {'a': 7, 'b': 'ham'}
tentebdb.py: 29 : return f'{eggs(b)} {eggs(a)}'
tentebdb.py: 25 : -> def eggs(x): {'x': 'ham'}
tentebdb.py: 26 : return x + x
tentebdb.py: 26 : <- eggs: hamham
tentebdb.py: 25 : -> def eggs(x): {'x': 7}
tentebdb.py: 26 : return x + x
tentebdb.py: 26 : <- eggs: 14
tentebdb.py: 29 : <- spam: hamham 14
tentebdb.py: 34 : return x
tentebdb.py: 34 : <- main: 4RE: Basic experiment with the bdb module - Larz60+ - Sep-09-2022
I seem to remember using this a long time ago.
Today I do all of my work using VSCode, and absolutely love the debugger that comes with the IDE, (which, although not sure, and too lazy to find out) comes built-in to the IDE).
Many other things I like about this IDE, and some I loathe (the way telemetry keeps sneaking in by way of new configuration options).
RE: Basic experiment with the bdb module - Gribouillis - Sep-10-2022
(Sep-09-2022, 10:23 PM)Larz60+ Wrote: and absolutely love the debugger that comes with the IDEMy goal here is to use the debugger to produce output in a special form instead of really debugging code. It is part of a small application where I use pseudo-python code to describe real-life procedures. I hope to specialize the bdb.Bdb class for this use case. I cannot use a IDE's debugger for this task, it is too rigid.