The python count() method counts the number of occurrences of an element in the list and returns it.

python count()方法對列表中某個元素的出現次數進行計數并返回它。

Syntax:

句法：

list.count(x)

The count() method takes a single argument, x, whose count is to be found. The count() method returns the number of occurrences of an element in a list.

count()方法采用一個參數x ，該參數的計數將被找到。 count()方法返回列表中某個元素的出現次數。

Example:

例：

# an example of list.count() method in Python# declaring a list website_list = ['google.com','includehelp.com', 'linkedin.com', 'google.com']# counting the occurrences of 'google.com' count = website_list.count('google.com') print('google.com found',count,'times.')# counting the occurrences of 'linkedin.com' count = website_list.count('linkedin.com') print('linkedin.com found',count,'times.')

Output

輸出量

google.com found 2 times. linkedin.com found 1 times.

The count() method works on tuple as well

count()方法也適用于元組

Example:

例：

# an example of count() method with tuple in Python# declaring a tuple sample_tuple = ((1,3), (2,4), (4,6))# conting occurrences of (1,2) count = sample_tuple.count((1,2)) print('(1,2) found',count,'times.')# conting occurrences of (1,3) count = sample_tuple.count((1,3)) print('(1,3) found',count,'times.')

Output

輸出量

(1,2) found 0 times. (1,3) found 1 times.

翻譯自: https://www.includehelp.com/python/how-can-i-count-the-occurrences-of-a-list-item.aspx

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