Yesterday I made a simulation using Python. I had a few difficulties with variables and debugging.
Is there any software for Python, which provides a decent debugger?
解決方案
Don't forget about post-mortem debugging! After an exception is thrown, the stack frame with all of the locals is contained within sys.last_traceback. You can do pdb.pm() to go to the stack frame where the exception was thrown then p(retty)p(rint) the locals().
Here is a function that uses this information to extract the local variables from the stack.
def findlocals(search, startframe=None, trace=False):
from pprint import pprint
import inspect, pdb
startframe = startframe or sys.last_traceback
frames = inspect.getinnerframes(startframe)
frame = [tb for (tb, _, lineno, fname, _, _) in frames
if search in (lineno, fname)][0]
if trace:
pprint(frame.f_locals)
pdb.set_trace(frame)
return frame.f_locals
Usage:
>>> def screwyFunc():
a = 0
return 2/a
>>> screwyFunc()
Traceback (most recent call last):
File "", line 1, in
screwyFunc()
File "", line 3, in screwyFunc
return 2/a
ZeroDivisionError: integer division or modulo by zero
>>> findlocals('screwyFunc')
{'a': 0}