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python Programming Glossary: list_1How to sort nested lists into seperate lists with unique values in python? http://stackoverflow.com/questions/16862090/how-to-sort-nested-lists-into-seperate-lists-with-unique-values-in-python no avail. Ideally the output would be something like this list_1 'name1' 'name2' list_2 'name4' 'name5' list_3 'name3' name6'.. of hard coding everything better use a dict with keys like list_1 as it'll handle any number number of variables. from collections.. dic 'list_' str k .append v #now access those lists dic 'list_1' 'name1' 'name2' dic 'list_2' 'name4' 'name5' dic 'list_3' 'name3'..
list comprehension filtering - “the set() trap” http://stackoverflow.com/questions/20056458/list-comprehension-filtering-the-set-trap on another list . People quickly find that this x for x in list_1 if x in list_2 is slow for large inputs it's O n m . Yuck. How.. set to make filtering lookups O 1 s set list_2 x for x in list_1 if x in s This gives nice overall O n behavior. I however often.. see even veteran coders fall into The Trap x for x in list_1 if x in set list_2 Ack This is again O n m since python builds..
http://stackoverflow.com/questions/2501675/printing-elements-out-of-list code import string import codecs import sys y sys.argv 1 list_1 f 1.0 x 0.05 write_in open new_file.txt w write_in_1 open new_file_1.txt..
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