Overview

pydiatra is yet another static checker for Python code.

Implemented checks

• embedded code copies

• except shadowing builtins (e.g. except IOError, OSError:, which overwrites OSError)

• bare except (i.e. except:)

• hardcoded errno values (e.g. exc.errno == 2 instead of exc.errno == errno.ENOENT)

• inconsistent use of tabs and spaces in indentation

• mkstemp() file descriptor leaks (e.g. path = tempfile.mkstemp()[1])

• obsolete PIL imports (e.g. import Image instead of from PIL import Image)

• regular expression syntax errors

• misplaced flags arguments in re.split(), re.sub(), re.subn()

• dubious or deprecated constructs in regular expressions:

  • 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

• string exceptions (e.g. raise "eggs" or except "ham":)

• string formatting errors

• comparisons with sys.version or sys.hexversion

• Python syntax errors

• Python syntax warnings

  • assertions that are always true

  • syntactic constructs that are no longer supported in Python 3

  • ill-formed assignments to global variables

  • use of async and await as names

  • invalid escape sequences in strings (Python 3.6+ only)

See the manual page for details.

Prerequisites

• Python 2.7 or 3.2+
• futures_ (needed only for Python 2.X)

.. _futures: https://pypi.org/project/futures/

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