pythoncount()方法计算列表中某个元素的出现次数并返回它。
语法:
list.count(x)
该count()方法采用一个参数x,该参数的计数将被找到。该count()方法返回列表中元素的出现次数。
示例
# Python中list.count()方法的示例 # 申报名单 website_list = ['google.com','nhooo.com', 'linkedin.com', 'google.com'] # 计算“ google.com”的出现 count = website_list.count('google.com') print('google.com found',count,'times.') # 计算“ linkedin.com”的出现 count = website_list.count('linkedin.com') print('linkedin.com found',count,'times.')
输出结果
google.com found 2 times. linkedin.com found 1 times.
该count()方法也适用于元组
示例
# Python中带元组的count()方法的示例 # 声明一个元组 sample_tuple = ((1,3), (2,4), (4,6)) # 限制出现(1,2) count = sample_tuple.count((1,2)) print('(1,2) found',count,'times.') # 限制出现(1,3) count = sample_tuple.count((1,3)) print('(1,3) found',count,'times.')
输出结果
(1,2) found 0 times. (1,3) found 1 times.