在 Python 中使用函数查找平均值

Question

我不明白如何找到两个或多个数字的平均值。我尝试导入统计信息库，因此我可以使用平均值函数，但有些东西不起作用。

我不断收到最近一次调用的错误回溯。

import statistics
def findAverage(avg,avg2):
avg= int(input( 'Please enter a number'))
avg2 = int(input('Please enter a number'))
findAverage()
average=statistics.mean()
print(average)

Answer 1

用途statistics.mean(list_of_values)如此

import statistics
def findAverage():
avg = int(input('Please enter a number1: '))
avg2 = int(input('Please enter a number2:'))
return statistics.mean([avg, avg2])
average = findAverage()
print(average)

Answer 2

您可以使用它找到任何数量数字的平均值：

# Python program to get average of a list 
def Average(lst): 
return sum(lst) / len(lst) 

# Number List
lst = [15, 9, 55, 41, 35, 20, 62, 49] 
average = Average(lst) 

# Printing average of the list 
print("Average of the list =", round(average, 2)) 

Answer 3

我什至不明白你的代码是做什么的？

我想你想这样做吗？

def findAverage(avg,avg2):

return (avg+avg2)/2
avg= int(input( 'Please enter a number'))
avg2 = int(input('Please enter a number'))
print(findAverage(avg, avg2))

Answer 4

在定义函数和调用函数时，应该具有相同数量的参数。以及在列表中调用statistics.mean函数：

import statistics
def findAverage():
avg1= int(input( 'Please enter a number'))
avg2 = int(input('Please enter a number'))
return statistics.mean([avg1, avg2])
findAverage()

Answer 5

Statistics.mean() 将list作为输入数据。通过在调用后将列表传递到()内来为其提供此数据，例如以下示例：

import statistics
data = [1,2,3] # a list of data
average = statistics.mean(data)
print(average)

这是您的修复示例，并附有注释来解释正在发生的事情：

import statistics
# anything inside the brackets below is a "parameter", which is 
# information which can be passed to function when calling it. 
# since this function finds the two numbers on its own, it doesn't 
# need to be passed any information, so i've removed avg and avg2
def findAverage():
# the two lines below for collecting numbers are perfect, 
# and don't need to be changed
avg = int(input( 'Please enter a number'))
avg2 = int(input('Please enter a number'))
# however since this is a function, we'll expect it to
# return the average value it calculated from the user input.
# we first put our data into a list like below:
data = [avg, avg2]
# then get the average by passing this data to the mean function
average = statistics.mean(data)
# then return this value so it can be printed out
return average

# we can now call our function, and print the result
print(findAverage())

Answer 6

首先，您需要提及值列表以statistics.mean([avg1,avg2])。 如果您只想找到两个值的平均值，则无需使用它。 你用(num1+num2)/2就足够了.

import statistics
def findAverage(num1,num2):
return statistics.mean([num1, num2])
num1= int(input( 'Please enter a number'))
num2= int(input('Please enter a number'))    
result=findAverage(num1,num2)
print(result)