Python List count()用法及代码示例

# create a list
numbers = [2, 3, 5, 2, 11, 2, 7]

# check the count of 2
count = numbers.count(2)


print('Count of 2:', count)

# Output: Count of 2: 3

用法:

用法:

list.count(element)

参数：

count() 方法采用单个参数：

• element- 要计算的元素

返回：

count() 方法返回 element 在列表中出现的次数。

示例 1：count() 的使用

# vowels list
vowels = ['a', 'e', 'i', 'o', 'i', 'u']

# count element 'i'
count = vowels.count('i')


# print count
print('The count of i is:', count)

# count element 'p'
count = vowels.count('p')


# print count
print('The count of p is:', count)

输出

The count of i is: 2
The count of p is: 0

示例 2：计算列表中的元组和列表元素

# random list
random = ['a', ('a', 'b'), ('a', 'b'), [3, 4]]

# count element ('a', 'b')
count = random.count(('a', 'b'))


# print count
print("The count of ('a', 'b') is:", count)

# count element [3, 4]
count = random.count([3, 4])


# print count
print("The count of [3, 4] is:", count)

输出

The count of ('a', 'b') is: 2
The count of [3, 4] is: 1