我有一個清單。我想通過為每個元素添加一個共同點來重復這些元素。main_list = ['lst1','lst2','lst3'] # existing listnew_list = ['lst1_mean','lst1_std','lst2_mean','lst2_std','lst3_mean','lst3_std'] # expected list我的代碼：aux_list1 = [i+'_mean' for i in main_list]aux_list2 = [i+'_std' for i in main_list]new_list = [i,j for i,j in zip(aux_list1,aux_list2)]有更好的方法嗎？
1 回答
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TA貢獻1799條經驗 獲得超8個贊
您可以簡單地使用嵌套循環：
main_list = ['lst1', 'lst2', 'lst3']
suffixes = ['_mean', '_std']
new_list = [w + s for w in main_list for s in suffixes]
print(new_list)
輸出：
['lst1_mean', 'lst1_std', 'lst2_mean', 'lst2_std', 'lst3_mean', 'lst3_std']
您還可以使用itertools.product（具有可變深度嵌套循環的概念）：
from itertools import product
main_list = ['lst1', 'lst2', 'lst3']
suffixes = ['_mean', '_std']
new_list = [''.join(w) for w in product(main_list, suffixes)]
print(new_list)
輸出：
['lst1_mean', 'lst1_std', 'lst2_mean', 'lst2_std', 'lst3_mean', 'lst3_std']
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