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python Programming Glossary: don'tWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python But this is not really OOP. We call type directly and we don't override call the parent __new__ . Let's do it class UpperAttrMetaclass.. you use some obscure error prone feature Well usually you don't Metaclasses are deeper magic than 99 of users should ever worry.. ever worry about. If you wonder whether you need them you don't the people who actually need them know with certainty that they..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python readable would moshe is 3 hello world this is a list oh I don't know containing just 4 elements be Not very. Specifically the..
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python last element and start adding them from tk1 # this way we don't need an if within the last while if lastadded 1 p.pop # now..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained in your code it gets a generator which is good because You don't need to read the values twice. You can have a lot of children.. the values twice. You can have a lot of children and you don't want them all stored in memory. And it works because Python..
http://stackoverflow.com/questions/261638/how-do-i-protect-python-code solution. The software will run on Linux systems so I don't think py2exe will do the trick . python obfuscation share..
Python “is” operator behaves unexpectedly with integers http://stackoverflow.com/questions/306313/python-is-operator-behaves-unexpectedly-with-integers arbitrary objects to see whether they are the same and I don't know in advance whether they are numbers or not python comparison..
*args and **kwargs? [duplicate] http://stackoverflow.com/questions/3394835/args-and-kwargs values become values of these arguments. To be honest I don't understand and don't get for what programming task this would.. of these arguments. To be honest I don't understand and don't get for what programming task this would helpful. I am sure..
http://stackoverflow.com/questions/3455456/what-kinds-of-patterns-could-i-enforce-on-the-code-to-make-it-easier-to-translat flow. Then I believe I can start outputting code. I don't need a perfect translation . I'll still have to review the generated.. on this topic see Life After Parsing . The remark about I don't need a perfect translation is troublesome. What weak translators.. of another 80 000 lines of translated program you already don't understand. That takes a huge amount of effort. At the million..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python iterate over a flattened version of the data structure and don't need an indexable sequence consider itertools.chain and company..
What is the most “pythonic” way to iterate over a list in chunks? http://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks need to work with four integers at a time. Unfortunately I don't have control of the input or I'd have it passed in as a list..
How to install pip on windows? http://stackoverflow.com/questions/4750806/how-to-install-pip-on-windows in C or C . Pip tries to compile from source. If you don't have a C C compiler installed and configured you'll see this..
Common pitfalls in Python [duplicate] http://stackoverflow.com/questions/1011431/common-pitfalls-in-python print TypeError python share improve this question Don't use index to loop over a sequence Don't for i in range len tab.. this question Don't use index to loop over a sequence Don't for i in range len tab print tab i Do for elem in tab print.. say It's easier to ask for forgiveness than permission . Don't if os.path.isfile file_path file open file_path else # do something..
Creating dynamically named variables from user input http://stackoverflow.com/questions/11354214/creating-dynamically-named-variables-from-user-input How can I create dynamically named variables . Answer Don't do this. Chances are there are better ways to solve the problem...
Sorting text file by using Python http://stackoverflow.com/questions/14465154/sorting-text-file-by-using-python manage it python sorting share improve this question Don't sort 10 million lines in memory. Split this up in batches instead..
Can I use Python as a bash replacement? http://stackoverflow.com/questions/209470/can-i-use-python-as-a-bash-replacement sed grep etc. can often be rewritten as Python modules. Don't go overboard. Replace what you need and evolve your grep module... Replace what you need and evolve your grep module. Don't start out writing a Python module that replaces grep . The best..
Inverse dictionary lookup - Python http://stackoverflow.com/questions/2568673/inverse-dictionary-lookup-python dictionary share improve this question There is none. Don't forget that the value may be found on any number of keys including..
How to validate IP address in Python? http://stackoverflow.com/questions/319279/how-to-validate-ip-address-in-python networking ip address share improve this question Don't parse it. Just ask. import socket try socket.inet_aton addr..
Why use pip over easy_install? http://stackoverflow.com/questions/3220404/why-use-pip-over-easy-install use pip over easy_install A tweet reads Don't use easy_install unless you like stabbing yourself in the face...
What's the proper way to install pip, virtualenv, and distribute for Python? http://stackoverflow.com/questions/4324558/whats-the-proper-way-to-install-pip-virtualenv-and-distribute-for-python virtualenv VERSION virtualenv.py ENV_OPTS INITIAL_ENV # Don't need this anymore. rm rf virtualenv VERSION # Install virtualenv..
Setting the correct encoding when piping stdout in python http://stackoverflow.com/questions/492483/setting-the-correct-encoding-when-piping-stdout-in-python
How to print in Python without newline or space? http://stackoverflow.com/questions/493386/how-to-print-in-python-without-newline-or-space or a space how can I avoid that Now it's just an example. Don't tell me I can first make a string then print it. I'd like to..
Using only the DB part of Django http://stackoverflow.com/questions/579511/using-only-the-db-part-of-django that are designed for library usage. Django's is not. Don't think that all of the above shows I dislike Django and all it's..
'import module' or 'from module import' http://stackoverflow.com/questions/710551/import-module-or-from-module-import module Pros Less maintenance of your import statements. Don't need to add any additional imports to start using another item..
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