Shabda Raaj - Essential Python Tools: Supercharge your Python development using professional tools

pdb [https://docs.python.org/3/library/pdb.html] is a debugging tool that is part of pythons standard library. It is an interactive source code debugger for Python programs.

Using pdb, we can set breakpoints [https://en.wikipedia.org/wiki/Breakpoint] at any point of our program to stop it and check for errors or the status of our running program.

pbd help speed up the debugging process a lot faster than using simple print() statements everywhere.

The easiest way to use pdb is to call it in the code youre working on.

As soon as the interpreter reaches this line, well receive a command prompt on the terminal where were running the program. This is a general Python prompt, but with some new commands.

for more commands check [https://docs.python.org/3/library/pdb.html#debugger-commands]

If we want to run the application from the debugger and set breakpoints without any changes in the source code, then we need to execute the application with the debugger, use the command

ipdb, the Ipython-enabled python debugger, with all pdbs features and adds ipython support for the interactive shell, like tab completion, color support, magic functions and more. We can use ipdb just as we use pdb.

PEP8 [https://www.python.org/dev/peps/pep-0008/?] is the official style guide for python. It is important to know the style-guide if you want to be a part of the python-community.

• Spaces are the preferred indentation method.

• Use 4 spaces per indentation level.

• Limit all lines to a maximum of 79 characters.

• Separate top-level function and class definitions with two blank lines.

• Method definitions inside a class are surrounded by a single blank line.

• Standard library imports.

• Related third party imports.

• Local application/library specific imports.

• A blank line between each group of imports.

Pycodestyle [https://github.com/PyCQA/pycodestyle] (Formerly PEP8) is the official linter tool to check the python code against the style conventions of PEP8 python.

To install it: pip install pycodestyle .

Let us take a small example script to test pycodestyle

We will create a test script file test_script.py and use it as an example for all the linters.

If we run pycodestyle: $ pycodestyle {source_file_or_directory}

To see the summary, use --statistics -qq$ pycodestyle --statistics -qq {source_file_or_directory}