[英]How do I flatten nested lists in Python?
我的清單是:
[['kukatpally'], ['gachibowli'], ['Madhapur'], ['Chintal'],........]
我想這樣顯示
['kukatpally', 'gachibowli', 'Madhapur', 'Chintal',....]
那么如何刪除那些'['和']'符號。
提前致謝
使用itertools.chain :
import itertools
l = [['kukatpally', 'somethingelse'], ['gachibowli'], ['Madhapur'], ['Chintal']]
list(itertools.chain(*l))
>> ['kukatpally', 'somethingelse', 'gachibowli', 'Madhapur', 'Chintal']
或者itertools.chain.from_iterable
import itertools
l = [['kukatpally', 'somethingelse'], ['gachibowli'], ['Madhapur'], ['Chintal']]
list(itertools.chain.from_iterable(l))
>> ['kukatpally', 'somethingelse', 'gachibowli', 'Madhapur', 'Chintal']
假設您的意思是您的子列表可能包含多個項目:
>>> ls = [['kukatpally'], ['gachibowli'], ['Madhapur'], ['Chintal']]
>>> new_list = [item for sublist in ls for item in sublist]
>>> new_list
['kukatpally', 'gachibowli', 'Madhapur', 'Chintal']
>>> ls = [['kukatpally'], ['gachibowli'], ['Madhapur'], ['Chintal']]
>>> l = [x[0] for x in ls]
>>> l
['kukatpally', 'gachibowli', 'Madhapur', 'Chintal']
>>>
new_list = [item[0] for item in old_list]
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