how to debug python code step by step

Опубликовано: 02 Октябрь 2024
на канале: CodeStack

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title: step-by-step guide to debugging python code
introduction:
debugging is an essential skill for every programmer. it helps identify and fix errors in your code, leading to more robust and efficient programs. in this tutorial, we will explore how to debug python code step by step using the built-in debugger, pdb. we'll cover the basics of setting breakpoints, inspecting variables, and navigating through your code to pinpoint and resolve issues.
to start debugging your python code, you need to import the pdb module into your script or program. add the following line at the beginning of your python file:
a breakpoint is a designated point in your code where the debugger will pause, allowing you to inspect variables and step through the code. you can set a breakpoint by adding the following line at the location where you want to start debugging:
execute your python script as you normally would. when the pdb.set_trace() line is reached, the program will pause, and the debugger prompt will appear.
n (next): execute the current line of code and stop at the first possible occasion (either in the current function or the calling function).
c (continue): continue execution until the next breakpoint is encountered or the program finishes.
q (quit): exit the debugger and terminate the program.
while paused at a breakpoint, you can inspect the values of variables.
use these commands to navigate through your code during debugging:
s (step): execute the current line of code and stop at the first possible occasion, even if it is inside a function called from the current line.
r (return): continue execution until the current function returns.
consider the following python code with a deliberate error:
after running the script, the debugger will pause at the pdb.set_trace() line. you can use the commands mentioned above to identify and fix the division by zero error.
debugging is an integral part of the software development process. by mastering the basics of the pdb debugger, yo ...

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