以下三種效率:3》2》1
- 需要用到序號(hào):
1.
for i in range(len(my_list)):
j = my_list[i]
2.
for i, each_value in enumerate(my_list):
j = each_value
- 不需要用到序號(hào):
3.
for i in my_list:
j = i
以下三種效率:3》2》1
1.
for i in range(len(my_list)):
j = my_list[i]
2.
for i, each_value in enumerate(my_list):
j = each_value
3.
for i in my_list:
j = i