breakpoint() and pdb Basics

Use breakpoint() to start the debugger and understand pdb for interactive debugging.

breakpoint() Function

Add breakpoints to pause execution for inspection.

def calculate(x, y):
    result = x + y
    breakpoint()  # Debugger will start here
    return result * 2

# When executed, this will start pdb debugger
# You can inspect variables and step through code
print("Debugger example")

Debugger example
> /path/to/script.py(3)calculate()
-> breakpoint()

pdb Basics

Understand pdb debugger and basic commands.

import pdb

def debug_function(items):
    total = 0
    for i, item in enumerate(items):
        # Start debugger at specific point
        if item > 5:
            pdb.set_trace()
        total += item
    return total

# Debugger commands:
# l - list code
# n - next line
# s - step into function
# c - continue
# p variable - print variable
# pp dict - pretty print

result = debug_function([1, 2, 3, 6, 7])
print(f"Result: {result}")

Result: 19