python Programming Glossary: iterable

How to generate all permutations of a list in Python

http://stackoverflow.com/questions/104420/how-to-generate-all-permutations-of-a-list-in-python

of itertools.permutations . Here's one def permutations iterable r None # permutations 'ABCD' 2 AB AC AD BA BC BD CA CB CD DA.. # permutations range 3 012 021 102 120 201 210 pool tuple iterable n len pool r n if r is None else r if r n return indices range.. And another based on itertools.product def permutations iterable r None pool tuple iterable n len pool r n if r is None else..

Loop “Forgets” to Remove Some Items

http://stackoverflow.com/questions/17299581/loop-forgets-to-remove-some-items

to do this. Make use of the fact that Python strings are iterable def remove_vowels text # function names should start with verbs..

In Python, how do I determine if an object is iterable?

http://stackoverflow.com/questions/1952464/in-python-how-do-i-determine-if-an-object-is-iterable

Python how do I determine if an object is iterable Is there a method like isiterable The only solution I have.. if an object is iterable Is there a method like isiterable The only solution I have found so far is to call hasattr myObj.. But I am not sure how fool proof this is. python iterable share improve this question Checking for __iter__ works..

The Python yield keyword explained

http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained

understand what generators are. And before generators come iterables. Iterables When you create a list you can read its items one.. 1 2 3 for i in mylist ... print i 1 2 3 Mylist is an iterable. When you use a list comprehension you create a list and so.. you use a list comprehension you create a list and so an iterable mylist x x for x in range 3 for i in mylist ... print i 0 1..

Flattening a shallow list in Python

http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python

better style to avoid operator magic by using chain.from_iterable like so chain itertools.chain.from_iterable 1 2 3 5 89 6 print.. chain.from_iterable like so chain itertools.chain.from_iterable 1 2 3 5 89 6 print list chain 1 2 3 5 89 6 python list comprehension.. 'image01' 'image10' It will work on anything that's iterable which should include Django's iterable QuerySet s which it appears..

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

the recipes section of Python's itertools docs def grouper iterable n fillvalue None args iter iterable n return izip_longest args.. docs def grouper iterable n fillvalue None args iter iterable n return izip_longest args fillvalue fillvalue Example In pesudocode..

Python code to pick out all possible combinations from a list?

http://stackoverflow.com/questions/464864/python-code-to-pick-out-all-possible-combinations-from-a-list

a look at itertools.combinations itertools.combinations iterable r Return r length subsequences of elements from the input iterable... r Return r length subsequences of elements from the input iterable. Combinations are emitted in lexicographic sort order. So if.. are emitted in lexicographic sort order. So if the input iterable is sorted the combination tuples will be produced in sorted..

Rolling or sliding window iterator in Python

http://stackoverflow.com/questions/6822725/rolling-or-sliding-window-iterator-in-python

in Python I need a rolling window aka sliding window iterable over a sequence iterator generator. Default Python iteration.. n 2 Returns a sliding window of width n over data from the iterable s s0 s1 ...s n 1 s1 s2 ... sn ... it iter seq result tuple..