[英]python program to sort a list in ascending order without using the sort function
[英]How do I sort a list in ascending order using a specific column, without using a build in function? (Python)
我已將 CSV 文件導入到 python 中的列表中,其中包含具有以下列的動物數據:
Sanctuary Identification,Type,Breed,Vaccinated,Neutered
P23533,Cat,Persian,Yes,Yes
P43533,Dog,Poodle,Yes,No
P18754,Dog...
數據以下列格式顯示:
[[P23533,Cat,Persian,Yes,Yes],[P43533,Dog,Poodle,Yes,No],[P18754,Dog...]]
我想按他們的 Sanctuary Indentifaction 升序對列表進行排序,即:
P1111, Cat, ..
P2222 Dog, ..
P3333.. etc
我不能在庫中使用任何構建,任何人都可以建議我如何 go 關於這個?
您可以使用sorted
內置 function 對嵌套列表進行排序,然后傳入第一列作為要排序的鍵。 下面是示例。
In [1]: my_list = [["P23533","Cat","Persian","Yes","Yes"],["P43533","Dog","Poodle","Yes","No"], ["P1111","Asd","Test","
...: Yes","Yes"]]
In [2]: sorted(my_list, key=lambda x: x[0])
Out[2]:
[['P1111', 'Asd', 'Test', 'Yes', 'Yes'],
['P23533', 'Cat', 'Persian', 'Yes', 'Yes'],
['P43533', 'Dog', 'Poodle', 'Yes', 'No']]
Alternatively, you can use pandas.read_csv
to load your csv into DataFrame
object, then use sort_values
function:
In [10]: df.sort_values(["SanctuaryID"]).reset_index(drop=True)
Out[10]:
SanctuaryID Animal Type Col4 Col5
0 P1111 Asd Test Yes Yes
1 P23533 Cat Persian Yes Yes
2 P43533 Dog Poodle Yes No
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