python - Python - 获取列表中的项目数不等于某事

Question

您如何获得此列表中不是 204 的项目数？

data = [204, 204, 204, 500, 204, 204, 500, 500, 204, 404]

number_of_not_204 = any(x != 204 for x in data)

# returns True
print number_of_not_204

# looking to get the number 4 (500, 500, 500, and 404 are not 204)

标签： python

Answer 1

您正在描述内置函数的基本用法sum：

>>> data = [204, 204, 204, 500, 204, 204, 500, 500, 204, 404] 
>>> sum(1 for n in data if n != 204) 
4