Pylint is an open-source code, quality, and bug tracking checker for the Python Programming Language.Pylint Develop By-Sylvain Thenault.
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Pylint also checks the number of lines. checking the variable of the class name and coding standard. It also integrates with most IDEs like Eclipse, PyDev, Pycharm, Visual Studio, and Atom also.

Install
For installation, You need to use the command line.
pip install pylint
If you are using Python 3.6+ or more version,Need to upgrade first
pip install pylint –upgrade
How to check the py file using Pylint
first of all you need to store your code using the .py(ex-welcome.py)
pylint welcome.py