list-comprehension

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python filter calculated values from large lists to create multiple smaller lists

I want to find an optimal method to process very large ordered lists of integers eg. biglist = [45, 34, 2, 78, 7, 9, 10, 33, 78, 51, 99, 24, 88, ... N] where N > 1m[详细]

2023-03-26 21:56 分类：问答
How can I do SQL like operations on a R data frame?

For example, I have a data frame with data across categories and subcategories and I want to be able to get row with maximum value in a particular column etc.[详细]

2023-03-25 14:12 分类：问答
Why does this nested list comprehension generate an error?

conn_request, weights = zip(*[ ((conn, request), request[2]) for conn in unchoked_conns for request in conn.peer_requests[详细]

2023-03-25 09:47 分类：问答
Python list comprehension troubles

I have some text manipulation to do, here开发者_运维问答\'s a for loop that does it: for p in paras[:]:[详细]

2023-03-25 09:33 分类：问答
Is list comprehension appropriate here?

I have to append elements to a list only if the current iterated element is not already in the list. >>> l = [1, 2][详细]

2023-03-24 22:02 分类：问答
List comprehension in pure BASH?

Is it possible to do LC like in python and other languages bu开发者_Python百科t only using BASH constructs?[详细]

2023-03-21 06:18 分类：问答
Python: Yield Dict Elements in generators?

Before I say a word, let me thank the community for being the authoritative location for my programming queries as of recent. And pretend those compliments weren\'t expressed using words. Anyway, the[详细]

2023-03-21 05:22 分类：问答
Creating a dictionary from a csv file?

I am trying to create a dictionary from a csv file. The first column of the csv file contains unique keys and the second column contains values. Each row of the csv file represents a uniqu开发者_如何学[详细]

2023-03-21 00:03 分类：问答
Rm duplication in list comprehension

Input is a string, the idea is to count the letters A-z only, and print them alphabeticall开发者_如何转开发y with the count of appearances.[详细]

2023-03-19 13:51 分类：问答
Recursion or list comprehension?

Working through Learn You a Haskell For Great Good, in the chapter on higher-order functions the author walks through an implementation of a few different library functions. When coming to t开发者_运维[详细]

2023-03-18 07:03 分类：问答