Debugging in Python

Reading Time : ~ .

When something goes wrong with your code instead of using standard debugging techniques such as print statements use debugging tools. I found two great tools for debugging.

  1. using the code module.
  2. pdb module.

1.using code module: This is very useful if your code working with out errors but dint give expected result.The code module has a function interact() which stops the program execution and opens a interactive python console that inherits the local scope of the line where the interact() method is called. In that console you can print variable values(instead of placing print statements in your code),examine the state of your code and fix the bug. Place the following line in your code where you want console to start.

import code
code.interact(local=locals())

To exit the interactive console and continue with execution use Ctrl+D or Ctrl+Z or exit(). Lets have a look at following example.

#file: inc.py

def testing():
    print 'before interact'
    a=10
    b=20
    c=a+b
    import code; code.interact(local=locals())
    print 'after interact'

testing()

The output is shown below:

ramya@ramya-ws:~/Desktop$ python inc.py
before interact
Python 2.7.4 (default, Sep 26 2013, 03:20:26)
[GCC 4.7.3] on linux2
Type 'help', 'copyright', 'credits' or 'license' for more information.
(InteractiveConsole)
>>> print c
30
>>> print a
10
>>> print b
20
>>>
after interact
ramya@ramya-ws:~/Desktop$
    By Posted On
SENIOR DEVELOPER at MICROPYRAMID

Need any Help in your Project?Let's Talk

Latest Comments
Related Articles
Python Arrow To Show Human Friendly Time Nikhila Mergu

Arrow is a python library and command-line tool to genrerate, manipulate dates, times, timestamps.
use of arrow:
With the use of arrow, we can also ...

Continue Reading...
Python using yield and generators. Dinesh Deshmukh

Generators are memory efficient. They allow us to code with minimum intermediate arguments, less data structures. Generators are of two types, generator expressions and generator ...

Continue Reading...
Building and Parsing XML Document using Python Swetha Naretla

Creating XML document with required elements, Then Parsing it using Python to generate a serialized form of its contents.

Continue Reading...

Subscribe To our news letter

Subscribe to our news letter to receive latest blog posts into your inbox. Please fill your email address in the below form.
*We don't provide your email contact details to any third parties