Python学习小技巧之列表项的排序

data_list = [6, 9, 1, 3, 0, 10, 100, -100] 
data_list.sort() 
print(data_list) 

[-100, 0, 1, 3, 6, 9, 10, 100] 

data_list = [6, 9, 1, 3, 0, 10, 100, -100] 
data_list_copy = sorted(data_list) 
print(data_list) 
print(data_list_copy) 

[6, 9, 1, 3, 0, 10, 100, -100] 
[-100, 0, 1, 3, 6, 9, 10, 100] 

data_list = [(0, 100), (77, 34), (55, 97)] 
data_list.sort(key=lambda x: x[1]) # 我们想要基于列表项的第二个数进行排序 
print(data_list) 
 
> [(77, 34), (55, 97), (0, 100)] 

data_list = [(0, 100), (77, 34), (55, 97)] 
data_list.sort(key=lambda x: x[1], reverse=True) # 我们想要基于列表项的第二个数进行排序，并倒序 
print(data_list) 
> [(0, 100), (55, 97), (77, 34)]