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python Programming Glossary: itertools.chainProcessing single file from multiple processes in python http://stackoverflow.com/questions/11196367/processing-single-file-from-multiple-processes-in-python p # produce data with open source.txt as f iters itertools.chain f None num_workers for num_and_line in enumerate iters work.put..
Double Iteration in List Comprehension http://stackoverflow.com/questions/1198777/double-iteration-in-list-comprehension comprehension answers let me also point out the excellent itertools.chain from itertools import chain list chain.from_iterable a list..
Python idiom to chain (flatten) an infinite iterable of finite iterables? http://stackoverflow.com/questions/120886/python-idiom-to-chain-flatten-an-infinite-iterable-of-finite-iterables would return 1 2 3 1 2 3 ... . The iterator is infinite so itertools.chain infinite will not work. Related Flattening a shallow list in..
http://stackoverflow.com/questions/1528711/reading-lines-2-at-a-time based solution def natatime_25 itr fillvalue None n 2 x itertools.chain iter itr fillvalue n 1 return itertools.izip x n since 2.5 doesn't..
How to look ahead one element in a Python generator? http://stackoverflow.com/questions/2425270/how-to-look-ahead-one-element-in-a-python-generator
Convert multi-dimensional list to a 1D list in Python http://stackoverflow.com/questions/2961983/convert-multi-dimensional-list-to-a-1d-list-in-python from that question itself. Note that the recipe returns an itertools.chain object which is iterable and the other question's answer returns..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python But neither of these methods are as efficient as using itertools.chain from itertools import chain list chain mi.image_set.all for.. operator magic by using 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.. structure and don't need an indexable sequence consider itertools.chain and company . list_of_menuitems 'image00' 'image01' 'image10'..
Comprehension for flattening a sequence of sequences? http://stackoverflow.com/questions/457215/comprehension-for-flattening-a-sequence-of-sequences sequence of sequences maybe a list of tuples I can use itertools.chain to flatten it. But sometimes I feel like I would rather write..
http://stackoverflow.com/questions/5239856/foggy-on-asterisk-in-python on asterisk in python I'm using itertools.chain to flatten a list of lists in this fashion uniqueCrossTabs list.. a list of lists in this fashion uniqueCrossTabs list itertools.chain uniqueCrossTabs how is this different than saying uniqueCrossTabs.. how is this different than saying uniqueCrossTabs list itertools.chain uniqueCrossTabs python operators share improve this question..
How can I flatten lists without splitting strings? http://stackoverflow.com/questions/5286541/how-can-i-flatten-lists-without-splitting-strings without breaking strings apart. For example In 39 list itertools.chain cat dog bird Out 39 'c' 'a' 't' 'dog' 'bird' and I would like..
http://stackoverflow.com/questions/716477/join-list-of-lists-in-python
Python out of memory on large CSV file (numpy) http://stackoverflow.com/questions/8956832/python-out-of-memory-on-large-csv-file-numpy npyio.py line 1495 in genfromtxt for i line in enumerate itertools.chain first_line fhd MemoryError I think it's just an out of memory..
Using itertools.product and want to seed a value http://stackoverflow.com/questions/9864809/using-itertools-product-and-want-to-seed-a-value alnum alnum alnum alnum alnum alnum # length 7 for p in itertools.chain len7 currentid ''.join p #semi static vars url 'http mysite.com..
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