how to use variable in input function python

Question

I'm new to python and trying to create a program to calculate grade. I've been stuck on below for over an hour now so any help appreciate.

assessment=[]    
weight=[]    
assign_number = int(input('How many assessment : '))    
for i in range(assign_number):    
   asses_name =input('Enter name of assessment: ')     
   assessment.append(asses_name)   
   asses_value = int(input(print('How many marks is the',assessment[i],'worth : ')))   
   weight.append(asses_value)

the problem is the asses_value keep returning none?example is below

How many assessment : 3
Enter name of assessment: test
How many marks is the test worth :
None

Any hint is appreciated, thanks everyone

sjw · Accepted Answer · 2018-03-27 10:06:28Z

1

The print() function in Python always returns None. So you need to remove it from this line:

asses_value = int(input(print('How many marks is the',assessment[i],'worth : ')))

Simply passing a string to the input function does what you need:

asses_value = int(input('How many marks is the ' + assessment[i] + ' worth : '))

Note that you can only pass a single string to input() though, which is why I have used the string concatenation operator + rather than passing three comma-separated strings.

As pointed out in the comments, an improvement to the above would be to use string formatting:

asses_value = int(input('How many marks is the {} worth : '.format(assessment[i])))

edited Mar 27, 2018 at 10:06

answered Mar 27, 2018 at 10:00

sjw

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Comments

Nitikesh Dubey · Accepted Answer · 2018-03-27 10:05:23Z

0

Hope! This code will help you out

assessment=[]    
weight=[]    
assign_number = int(input('How many assessment : '))    
for i in range(assign_number):    
   asses_name =input('Enter name of assessment: ')     
   assessment.append(asses_name)   
   asses_value = int(input('How many marks is the ' +assessment[i]+' worth : '))
   weight.append(asses_value)

Update: You tried to print the the value while taking the input that's why all the error occur

edited Mar 27, 2018 at 10:05

answered Mar 27, 2018 at 9:59

Nitikesh Dubey

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