Python示例：计算列表项平均值

Python 示例

写一个 Python示例来计算列表项的平均值。这个 Python 示例允许输入列表项，并使用 sum 函数计算总和和平均值。

avglist = []
Number = int(input("Total Number of List Items = "))

for i in range(1, Number + 1):
    value = int(input("Please enter the %d List Item = "  %i))
    avglist.append(value)

total = sum(avglist)
avg = total / Number

print('\nThe Sum Of List Items     = ', total)
print('\nThe Average Of List Items = ', avg)

在这个 python 程序中，我们从统计模块中导入了平均值，并从 functools 模块中进行了缩减。这两个 Python 函数都将计算列表项的平均值。

from statistics import mean
from functools import reduce

avglist = []
Number = int(input("Total Number of List Items = "))

for i in range(1, Number + 1):
    value = int(input("Please enter the %d List Item = "  %i))
    avglist.append(value)

total = sum(avglist)
avg1 = mean(avglist)
avg2 = reduce(lambda x, y: x + y, avglist) / Number
#avg2 = reduce(lambda x, y: x + y, avglist) /len(avglist)

print('\nThe Sum Of List Items     = ', total)
print('\nThe Average Of List Items = ', avg1)
print('\nThe Average Of List Items = ', avg2)

Total Number of List Items = 6
Please enter the 1 List Item = 19
Please enter the 2 List Item = 98
Please enter the 3 List Item = 56
Please enter the 4 List Item = 49
Please enter the 5 List Item = 77
Please enter the 6 List Item = 67

The Sum Of List Items     =  366

The Average Of List Items =  61

The Average Of List Items =  61.0

这个 python 程序使用 for 循环来迭代列表项，并计算所有列表元素的总和和平均值。

avglist = []
total = 0

Number = int(input("Total Number of List Items = "))

for i in range(1, Number + 1):
    value = int(input("Please enter the %d List Item = "  %i))
    avglist.append(value)

for i in range(Number):
    total = total + avglist[i]

avg = total / Number

print('\nThe Sum Of List Items     = ', total)
print('\nThe Average Of List Items = ', avg)

Total Number of List Items = 7
Please enter the 1 List Item = 22
Please enter the 2 List Item = 13
Please enter the 3 List Item = 43
Please enter the 4 List Item = 67
Please enter the 5 List Item = 98
Please enter the 6 List Item = 11
Please enter the 7 List Item = 26

The Sum Of List Items     =  280

The Average Of List Items =  40.0

在这个 Python 例子中，listAverage 函数接受一个列表，并返回所有列表项的总和和平均值。

def listAverage(avglist):
    total = 0
    for i in range(Number):
       total = total + avglist[i]
    avg = total / len(avglist)
    return total, avg

avglist = []

Number = int(input("Total Number of List Items = "))

for i in range(1, Number + 1):
    value = int(input("Please enter the %d List Item = "  %i))
    avglist.append(value)

total, avg = listAverage(avglist)

print('\nThe Sum Of List Items     = ', total)
print('\nThe Average Of List Items = ', avg)

Total Number of List Items = 8
Please enter the 1 List Item = 2
Please enter the 2 List Item = 9
Please enter the 3 List Item = 11
Please enter the 4 List Item = 24
Please enter the 5 List Item = 58
Please enter the 6 List Item = -11
Please enter the 7 List Item = 17
Please enter the 8 List Item = 99

The Sum Of List Items     =  209

The Average Of List Items =  26.125