python - 用户输入平均值

Question

我的老师不在类里面教我们，我正在努力自学。这是我应该做的，这是我已经做到的。任何帮助将不胜感激!

• Takes a list of five numbers from the user
• Prints the list
• Prints the average
• Modifies the list so each element is one greater than it was before
• Prints the modified list

 def average():
     x=a+b+c+d+e
     x=x/5
     print("the average of your numbers is: " +x+ ".")

 my_list =[ ]
 for i in range (5):
     userInput = int(input("Enter a number: ")
     my_list.append(userInput)
     print(my_list)
 average(my_list)

感谢您的帮助，您的 pipe 只能走这么远了!

Answer 1

The main functions that are going to be useful to you here are sum() and len()

sum()返回可迭代项的总和

len()返回 python 对象的长度

使用这些函数，您的案例也很容易应用:

my_list = []
plus_one = []

for x in range(5):
    my_list.append(x)
    plus_one.append(x+1) 

print my_list
print plus_one

def average():
    average = sum(my_list) / len(my_list) 
    return average

print average()

正如 Shashank 指出的那样，推荐的方法是在函数中定义一个参数，然后在调用函数时传递列表的参数。不确定您是否已经了解参数，所以我最初将其排除在外。无论如何，它在这里:

def average(x):
    # find average of x which is defined when the function is called

print average(my_list) # call function with argument (my_list)

这样做的好处是，如果您有多个列表，则不需要新函数，只需更改函数调用中的参数即可。