pdb/ipdb for python break on editable condition

Question

Say I have code the following code:

for i in range(100):
    print i

In general I can add one line to the code as:

for i in         


        

Answer 1

I think you were looking for a more direct solution that did not involve adding lines to the code, and just involved debugger commands.

Your original example of

b xx, i == 10 

doesn't work, because you are setting a breakpoint at the place in your code you inserted the ipdb.set_trace() command. By adding the statement 'b xx, i == 10' in the debugger, you actually have 2 break points (1 conditional and 1 unconditional) defined at the same location (assuming xx is the line were the set_trace() command is).

Alternatively, once you have defined breakpoints in your code using the 'b' command, which apparently works for you. You can add a condition to the breakpoint by

condition bpnumber boolean-expression

for example

condition 1 i == 10

Note: the bpnumber is the number assigned to the breakpoint, not the line in your code. To see a list of breakpoints, just type 'b' with no arguments.

Also, if you want to enter debug mode without using ipdb.set_trace(), you simply run your code with the pdb/ipbd module enabled

python -m pdb foo.py