How to debug python script for beginners ?

Recently i encountered an error in python script.

And i was searching some way to debug the script.

Luckily i got a way to do so by using python debugger(pdb) option with python command and traversing the program statement using “n” i.e. next statement.

Lets see how to do this.

Debugging a python script “operator.py”

Here i have created a script called opertor.py and facing an issue in second line where i defined a variable “y” having string “ngelinux” without quotes like below:
y=ngelinux
Hence it assumed “ngelinux” to be a variable instead of a string and thrown an error.

I have debugged the script like below.

user@ngelinux$ python -m pdb ./operator.py 
> /Users/saket1447583/python/operator.py(2)()
-> x=2
(Pdb) 
(Pdb) 
(Pdb) n
> /Users/saket1447583/python/operator.py(3)()
-> y=ngeLinux
(Pdb) n
NameError: "name 'ngeLinux' is not defined"
> /Users/saket1447583/python/operator.py(3)()
-> y=ngeLinux
(Pdb) q
user@ngelinux$

Tags: debugdebuggingoptionpdbpythonscript