Pydiatra Code Analyzer Plugin for Flake8

pydiatra (github) is yet another static checker for Python code.

Why another static checker

Among other checks pydiatra offers number of regexp checks which are hard to find within other analyzers:

• duplicate range (e.g. re.compile("[aa]"))
• overlapping ranges (e.g. re.compile("[a-zA-z]"))
• bad escape sequences (e.g. re.compile(r"\eggs"))
• misplaced inline flags (e.g. re.compile("eggs(?i)"); Python 3.6+ only)
• combining incompatible flags
• redundant flags
• misplaced flags arguments in re.split(), re.sub(), re.subn()

And some other nice to have checks:

• invalid escape sequences in strings (Python 3.6+ only)
• hardcoded errno values (e.g. exc.errno == 2 instead of exc.errno == errno.ENOENT)

Supported checks

For complete list of implemented checks consult pydiatra page.

Below is list of checks supported by this plugin:

• PYD001 assertion always true
• PYD002 async await used as name
• PYD003 embedded code copy
• PYD004 except shadows builtin
• PYD005 bare except
• PYD006 hardcoded errno value
• PYD007 inconsistent indentation
• PYD008 mkstemp file descriptor leak
• PYD009 obsolete pil import
• PYD010 py3k compat warning
• PYD011 regexp bad escape
• PYD012 regexp duplicate range
• PYD013 regexp incompatible flags
• PYD014 regexp misplaced inline flags
• PYD015 regexp misplaced flags argument
• PYD016 regexp overlapping ranges
• PYD017 regexp redundant flag
• PYD018 regexp syntax error
• PYD019 regexp syntax warning
• PYD020 string exception
• PYD021 string formatting error
• PYD022 syntax error
• PYD023 syntax warning
• PYD024 sys.hexversion comparison
• PYD025 sys.version comparison

Flake8 violation classes

This plugin uses PYD0 as violation class. Add it to flake8's select to enable.

flake8 --select PYD0 .