Working with the Python Debugger
Python Debugger may be a new word for the beginner developers . In this post , we will try to explain the meaning of Debugging and Debugging with Python .
What is Debugging?
Debugging means the complete control over the program execution. Developers use debugging to overcome program from any bad issues. So debugging is a healthier process for the program and keeps the diseases bugs far away. Python also allows developers to debug the programs using pdb module that comes with standard Python by default. We just need to import pdb module in the Python script. Using pdb module, we can set breakpoints in the program to check the current status. We can Change the flow of execution by using jump, continue statements . Let’s understand debugging with a Python program.
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5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45 5 * 10 = 50
This program simply print multiplication table but now we need to debug the loop steps using set_trace() function call to pdb module .
Basic Commands to use Python Debugger
list command to see entire program .
list 3 , 6 to see the program lines from 3 to 5 only .
break command to stop the program execution at particular line .
continue command to see the next step in the loop .
jump command allows us to go on any particular line in the program .
pp command to see variable value at the current position in the program .
disable command to disable the current line output and we can use continue command to skip this line in program. We use quit or exit command to come outside the debugging mode .
Debugging helps developers to analyze programs line by line. Developers see the every interpreted line by using debugging mode in programs. Python comes with by default debugger that is easy to import and use. So it is good to start with debugger when confused about execution of large loops, current variable values and all .