pycodestyle: add page (#1717)

pages/common/pycodestyle.md

@@ -0,0 +1,23 @@
+# pycodestyle
+
+> A tool to check Python code against PEP 8 style conventions.
+
+- Check the style of a single file:
+
+`pycodestyle {{file.py}}`
+
+- Check the style of multiple files:
+
+`pycodestyle {{file1.py}} {{file2.py}} {{file3.py}}`
+
+- Show only the first occurrence of an error:
+
+`pycodestyle --first {{file.py}}`
+
+- Show the source code for each error:
+
+`pycodestyle --show-source {{file.py}}`
+
+- Show the specific PEP 8 text for each error:
+
+`pycodestyle --show-pep8 {{file.py}}`