Python Debugger

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Getting Started

import pdb;pdb.set_trace()

Start pdb inside a python script

python -m pdb <file.py>

Start pdb from the command line

Stepping

n(ext)

Step over

s(tep)

Step into

r(eturn)

Continue until the current function returns

c(ontinue)

Continue until the next breakpoint is encountered

u(p)

Up one level in the stack trace

d(own)

Down one level in the stack trace

h(elp)

h(elp) command

Show help

q(uit)

Quit debugger

Breakpoints

b(reak)

Show all breakpoints

b(reak) line_number

Set a breakpoint at a specific line

b(reak) line_number, condition

Set a breakpoint at a specific line, if condition is met

b(reak) file:line_number

Set a breakpoint in a file at a specific line

b(reak) func

Set a breakpoint at the first line of a function

disable number

Disable breakpoint number

enable number

Enable breakpoint number

clear number

Remove breakpoint number

Printing

p(rint) expr

pp expr

Print the value of expr

w(here)

Print current position and stack trace

l(ist)

l(ist) start, end

Print 11 lines of code around the current line

a(rgs)

Print the arguments of the current function