|News||Python -- Scripting language with generators and coroutines.||Recommended Links||Python Debugging||pdb ó The Python Debugger||Python pretty printers|
|Python Braces Debate||Programming environment||Python IDEs||Pycharm IDE||Jython|
|Algorithms||Quotes||Python history||Python Cheatsheets||Etc||Tutorials|
Pylint is a static type checker for Python (compare with PyChecker 0.4)
David Jeske and Scott Hassan proved that it is possible to do this. They are working on a type inference engine that understands the Python language and can detect type errors and violations.
Adding type checking to python without changing the language will ease the maintenance of a large python project with lots of developers.
Please remember that eGroups before it was bought by Yahoo was a huge Python project (more than 180,000 lines of Python doing everything from a 100% dynamic website to all email delivery, pumping out 200 messages/second on a single 400 MHz Pentium!)
The latest version of PyChecker is 0.8.19
PyChecker is a tool for finding bugs in python source code. It finds problems that are typically caught by a compiler for less dynamic languages, like C and C++. It is similar to lint. Because of the dynamic nature of python, some warnings may be incorrect; however, spurious warnings should be fairly infrequent.
PyChecker works in a combination of ways. First, it imports each module. If there is an import error, the module cannot be processed. The import provides some basic information about the module. The code for each function, class, and method is checked for possible problems.
Types of problems that can be found include:
- No global found (e.g., using a module without importing it)
- Passing the wrong number of parameters to functions/methods/constructors
- Passing the wrong number of parameters to builtin functions & methods
- Using format strings that don't match arguments
- Using class methods and attributes that don't exist
- Changing signature when overriding a method
- Redefining a function/class/method in the same scope
- Using a variable before setting it
- self is not the first parameter defined for a method
- Unused globals and locals (module or variable)
- Unused function/method arguments (can ignore self)
- No doc strings in modules, classes, functions, and methods
Here's an article about PyChecker in Unix Review by Cameron Laird and Kathryn Soraiz.
To use PyChecker, pass options and the python source files (or packages) you want to check on the command line:pychecker [options] file1.py file2.py ...
Some of the most commonly used options are:
Options Description Default value --only only warn about files passed on the command line no -#, --limit the maximum number of warnings to be displayed 10 --no-shadowbuiltin check if a variable shadows a builtin off -q, --stdlib ignore warnings from files under standard library off -T, --argsused unused method/function arguments on
Note: On Windows, use pychecker.bat. You may also need to add python/scripts to your PATH.
pychecker and pychecker.bat will only exist if pychecker has been installed. To install, do: python setup.py install
Note: If you haven't installed pychecker, it can be run by doing: python pychecker/checker.py
An alternate way to use PyChecker is to import it in your code. See Importing PyChecker below for more details.
If there are import dependencies in your source files, you should import those files first on the command line in order to get as many files checked as possible.
PyChecker works with Python 2.0 through 2.7. Some features don't work on earlier versions of Python. PyChecker is tested with Python 2.2 through 2.7 using buildbot.
You can use the test files as examples:pychecker test_input/*.py
If you want to change the default behaviour, you can pass command line options or define a .pycheckrc file. For an example, look at pycheckrc.pychecker -hwill show the available options.
There is a simple GUI which is not maintained much. It is good for showing all the options and also allows you to run pychecker. To run options, you will need to start it manually:python pychecker/options.py
If you want to suppress warnings on a module/function/class/method, you can define a suppressions dictionary in .pycheckrc. Examples of keys are: 'module', 'module.function', 'module.class', 'module.class.method', etc.
You can also define suppressions in your code by doing:__pychecker__ = 'no-namedargs maxreturns=0 unusednames=foo,bar'
The format for __pychecker__ values and values in the suppressions dictionary are the same. Dashes (--) are optional when preceding long option names.
Google matched content
Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers : Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism : The Iron Law of Oligarchy : Libertarian Philosophy
War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda : SE quotes : Language Design and Programming Quotes : Random IT-related quotes : Somerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose Bierce : Bernard Shaw : Mark Twain Quotes
Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 : Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law
Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds : Larry Wall : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOS : Programming Languages History : PL/1 : Simula 67 : C : History of GCC development : Scripting Languages : Perl history : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history
The Peter Principle : Parkinson Law : 1984 : The Mythical Man-Month : How to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Haterís Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite
Most popular humor pages:
Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor
The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D
Copyright © 1996-2020 by Softpanorama Society. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.
FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.
This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...
|You can use PayPal to to buy a cup of coffee for authors of this site|
Last modified: November 20, 2019