This package will lint your opened Python-files in Atom, using pylama (wrapper for Pylint, pycodestyle/pep8, pydocstyle/pep257, Pyflakes, McCabe, Radon and isort).
$ apm install linter-pylama
pylint
linter, you should install pylama_pylint module.$ apm install linter-pylama
There are other linters available - take a look at the linters mainpage.