python-itertools

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Generating subsets of a permuted wordlist in Python

I have a list of words and I need to generate all possible permutations of these, with one caveat. I currently use the following code:[详细]

2023-01-30 19:12 分类：问答
Best way to enumerate a cartesian product with labels in python?

Given a dictionary mapping variables to possible outcomes: { \'lblA\' : [False, True], \'lblB\' : [False, True], \'lblC\' : [0,1,2] }[详细]

2023-01-28 09:59 分类：问答
python itertools skipping ahead

I have a list of lists. Using itertools, I am basically doing for result in product([A,B],[C,D],[E,F,G]):[详细]

2023-01-25 01:35 分类：问答
Eliminate dups and sum corresponding terms in lists

Given these 2开发者_JAVA技巧 lists L2 = [A,B,C,D,A,B] L3 = [3,2,1,2,2,1] I want to obtain L2_WANTED = [A,B,C,D][详细]

2023-01-23 19:52 分类：问答
Pythonic way of copying an iterable object

For a small project I\'m working on I need to cycle through a list. For each element of this cycle I have to start another 开发者_JAVA百科cycle through the same list, with the former element as first[详细]

2023-01-18 07:41 分类：问答
How do I yield a pre-unpacked list?

I have a list that is created within an itertools.groupby operation: def yield_unpacked_list(): for key, grp in itertools.groupby(something_to_groupby, key=lambda x: x[0]):[详细]

2023-01-13 06:54 分类：问答
Special type of combination using itertools

I am almost finished with a task someone gave me that at first involved easy use of the produ开发者_如何学编程ct() function from itertools.[详细]

2023-01-11 19:28 分类：问答
How to use itertools.groupby when the key value is in the elements of the iterable?

To illustrate, I start with a list of 2-tuples: import itertools import operator raw = [(1, \"one\"), (2, \"two\"),[详细]

2023-01-10 15:51 分类：问答
Does python have a non-lazy version of itertools.groupby?

I don\'t need the laziness of itertools.groupby. I just want to group my list into a dict of lists as such:[详细]

2023-01-07 20:58 分类：问答
What should itertools.product() yield when supplied an empty list?

I guess it\'s an academic question, but the second result does not make sense to me. Shouldn\'t it be as thoroughly empty as the first? What is the rationale for this behavior?[详细]

2023-01-05 12:46 分类：问答