Question

我正在编写一个计算平均值的程序。一切正常，除非程序尝试计算平均值。似乎没有存储我的输入，因此它计算平均值为0.0。我在3.6上使用Python IDLE。这是我的代码：

def main（）：

#variables holding the total number of wins per year

year1 = 0
year2 = 0
year3 = 0
year4 = 0
year5 = 0
average = year1 + year2 + year3 + year4 + year5/5

#Introduction

print ("Enter number of wins when prompted")

#Ask user for win totals per year

year1 = (input("Please enter the number of wins for year one: "))
year2 = (input("Please enter the number of wins for year one: "))
year3 = (input("Please enter the number of wins for year one: "))
year4 = (input("Please enter the number of wins for year one: "))
year5 = (input("Please enter the number of wins for year one: "))

#calculate average

print ("Total average of wins over five years: ", average)

这是输入我的值后的结果：

在提示时输入获胜次数

请输入第一年的获胜次数：8

请输入第一年的获胜次数：6

请输入第一年的获胜次数：3

请输入第一年的获胜次数：7

请输入第一年的获胜次数：9

五年总胜率：0.0

Answer 1

Daniel的更新是正确的，您创建平均值的时间太早了。以下是一些更新的代码，可帮助您学习：

print ("Enter number of wins when prompted")

#Ask user for win totals per year
wins_by_year = []
for year in range(5):
    wins_by_year.append(int(input("Please enter the number of wins for year {}: ".format(year+1))))

average = sum(wins_by_year)/len(wins_by_year)
print ("Total average of wins over five years: {}".format(average))

Answer 2

您必须在分配变量之后计算平均值，还需要将输入转换为整数（int）。另外，正如@Denziloe和@Vage Egiazarian指出的那样，您应该考虑算术运算的顺序。请遵循代码：

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
 name: 'listFilter'
})
export class ListFilterPipe implements PipeTransform {
 list = [];
 transform(value: any[], args?: string): any[] {
  this.list = [];
  if ( typeof value !== 'undefined' ) {
   value.forEach(val => {
    if (val.group.indexOf(args) > -1) {
      this.list.push(val);
    }
   });
   return this.list;
  }
 }
}

存储变量后如何计算平均值？

2 个答案: