Pylint is a code analysis tool created by LogiLab. It is more complex than Pyflakes and allows more customization. For more information about pylint you can check the manual (broken link).
You can install pylint through easy_install or pip, and if you use a Debian-based Linux distribution you can install it via apt-get:
easy_install pylintpip install pylintapt-get install pylintThe output of pylint can be raw text or html format. Messages have the following format:
MESSAGE_TYPE: LINE:[OBJECT:] MESSAGE
The message type can be one of the following:
- [R]: Means that refactoring the code is recommended.
- [C]: Means that there was a style violation in the code.
- [W]: A warning about a minor problem.
- [E]: Means an error message or a potential bug.
- [F]: Indicates a fatal error, blocking any further analysis.
- The same code from the previous article will be used:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#Se importa numpy como np
import numpy as np
from pudb import set_trace; set_trace()
import string
a = np.arange(10)
print a
print a[8]
print a[9]
for i in a:
if i == plataforma:
print iThis script is saved with the name arreglo.py.
Now pylint will be run, passing the file arreglo.py as an argument:
The output of running pylint is shown below:
************* Module arreglo
C: 1,0: Missing docstring
C: 7,28: More than one statement on a single line
W: 8,0: Uses of a deprecated module 'string'
C: 12,0: Invalid name "a" (should match (([A-Z_][A-Z0-9_]*)|(__.*__))$)
E: 18,12: Undefined variable 'plataforma'
W: 8,0: Unused import string
Report
======
12 statements analysed.
Duplication
-----------
+-------------------------+------+---------+-----------+
| |now |previous |difference |
+=========================+======+=========+===========+
|nb duplicated lines |0 |0 |= |
+-------------------------+------+---------+-----------+
|percent duplicated lines |0.000 |0.000 |= |
+-------------------------+------+---------+-----------+
Statistics by type
------------------
+---------+-------+-----------+-----------+------------+---------+
|type |number |old number |difference |%documented |%badname |
+=========+=======+===========+===========+============+=========+
|module |1 |1 |= |0.00 |0.00 |
+---------+-------+-----------+-----------+------------+---------+
|class |0 |0 |= |0 |0 |
+---------+-------+-----------+-----------+------------+---------+
|method |0 |0 |= |0 |0 |
+---------+-------+-----------+-----------+------------+---------+
|function |0 |0 |= |0 |0 |
+---------+-------+-----------+-----------+------------+---------+
External dependencies
---------------------
::
numpy (arreglo)
pudb
\-set_trace (arreglo)
Raw metrics
-----------
+----------+-------+------+---------+-----------+
|type |number |% |previous |difference |
+==========+=======+======+=========+===========+
|code |11 |64.71 |11 |= |
+----------+-------+------+---------+-----------+
|docstring |0 |0.00 |0 |= |
+----------+-------+------+---------+-----------+
|comment |3 |17.65 |3 |= |
+----------+-------+------+---------+-----------+
|empty |3 |17.65 |3 |= |
+----------+-------+------+---------+-----------+
Messages by category
--------------------
+-----------+-------+---------+-----------+
|type |number |previous |difference |
+===========+=======+=========+===========+
|convention |3 |3 |= |
+-----------+-------+---------+-----------+
|refactor |0 |0 |= |
+-----------+-------+---------+-----------+
|warning |2 |2 |= |
+-----------+-------+---------+-----------+
|error |1 |1 |= |
+-----------+-------+---------+-----------+
Messages
--------
+-----------+------------+
|message id |occurrences |
+===========+============+
|W0611 |1 |
+-----------+------------+
|W0402 |1 |
+-----------+------------+
|E0602 |1 |
+-----------+------------+
|C0321 |1 |
+-----------+------------+
|C0111 |1 |
+-----------+------------+
|C0103 |1 |
+-----------+------------+
Global evaluation
-----------------
Your code has been rated at 1.67/10 (previous run: 1.67/10)If you want more information about what is generated in the pylint report, you can check the documentation mentioned above (broken link).
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