枚舉(enumerate)是Python內(nèi)置函數(shù)。

enumerate允許我們遍歷數(shù)據(jù)并自動計數(shù)

for index, value in enumerate(some_list):
    print(index, value)

定制從哪個數(shù)字開始枚舉。

my_list = ['apple', 'banana', 'grapes', 'pear']
for c, value in enumerate(my_list, 1):
    print(c, value)

# 輸出:
(1, 'apple')
(2, 'banana')
(3, 'grapes')
(4, 'pear')

創(chuàng)建包含索引的元組列表

my_list = ['apple', 'banana', 'grapes', 'pear']
counter_list = list(enumerate(my_list, 1))
print(counter_list)
# 輸出: [(1, 'apple'), (2, 'banana'), (3, 'grapes'), (4, 'pear')]