python Programming Glossary: fillvalue

http://stackoverflow.com/questions/1528711/reading-lines-2-at-a-time

open fn as f for line line2 in itertools.izip_longest f f fillvalue '' print line line2 Alas izip_longest requires Python 2.6 or.. more general N at a time iterator wrapper def natatime itr fillvalue None n 2 return itertools.izip_longest iter itr n fillvalue.. None n 2 return itertools.izip_longest iter itr n fillvalue fillvalue itertools is generally the best way to go but if you..

Alternative way to split a list into groups of n

http://stackoverflow.com/questions/1624883/alternative-way-to-split-a-list-into-groups-of-n

2.6 use itertools.izip_longest def grouper n iterable fillvalue None grouper 3 'ABCDEFG' 'x' ABC DEF Gxx args iter iterable.. Gxx args iter iterable n return itertools.zip_longest args fillvalue fillvalue Example usage list grouper 3 range 9 0 1 2 3 4 5 6.. iterable n return itertools.zip_longest args fillvalue fillvalue Example usage list grouper 3 range 9 0 1 2 3 4 5 6 7 8 list..

how can I iterate through two lists in parallel in Python? [duplicate]

http://stackoverflow.com/questions/1663807/how-can-i-iterate-through-two-lists-in-parallel-in-python

to that iterator. You can also set a different fillvalue besides None if you wish. See here for the full story . share..

interleaving 2 lists of unequal lengths [duplicate]

http://stackoverflow.com/questions/19883826/interleaving-2-lists-of-unequal-lengths

hi bye no yes why s object y for x in izip_longest xs ys fillvalue s for y in x if y is not s 1 'hi' 2 'bye' 3 'no' 'yes' 'why'..

Some built-in to pad a list in python

http://stackoverflow.com/questions/3438756/some-built-in-to-pad-a-list-in-python

whatever you please N 5 class MyList list def ljust self n fillvalue '' return self fillvalue N len self a MyList '1' b a.ljust 5.. MyList list def ljust self n fillvalue '' return self fillvalue N len self a MyList '1' b a.ljust 5 '' share improve this..

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

section of Python's itertools docs def grouper iterable n fillvalue None args iter iterable n return izip_longest args fillvalue.. None args iter iterable n return izip_longest args fillvalue fillvalue Example In pesudocode to keep the example terse. grouper.. args iter iterable n return izip_longest args fillvalue fillvalue Example In pesudocode to keep the example terse. grouper 'ABCDEFG'..

Creating sublists

http://stackoverflow.com/questions/4501636/creating-sublists

are filled with the value None. izip_longest can take a fillvalue parameter as well if something other than None is desired. list1..

Pairs from single list

http://stackoverflow.com/questions/4628290/pairs-from-single-list

you want to pair all elements you obviously might need a fillvalue from itertools import izip_longest def blockwise t size 2 fillvalue.. from itertools import izip_longest def blockwise t size 2 fillvalue None it iter t return izip_longest it size fillvalue fillvalue..

Iterate an iterator by chunks (of n) in Python?

http://stackoverflow.com/questions/8991506/iterate-an-iterator-by-chunks-of-n-in-python

comes close to what you want def grouper n iterable fillvalue None grouper 3 'ABCDEFG' 'x' ABC DEF Gxx args iter iterable.. 'x' ABC DEF Gxx args iter iterable n return izip_longest fillvalue fillvalue args It will fill up the last chunk with a fill value.. DEF Gxx args iter iterable n return izip_longest fillvalue fillvalue args It will fill up the last chunk with a fill value though...