Python：为什么这段代码将“无”写入文件？

Question

def obtainResumeDescriptions(self):
    resumeCount = int(input("How many different versions of your resume do you use? "))
    print()

    resumeTrackingLog = open("resumeTrackingLog.txt", "w")

    print("Please enter a brief description of each resume.")
    print()

    for count in range(resumeCount):
        resumeNumber = str(print("Resume #", count + 1, ": ", sep=""))
        resumeDescription = str(input())
        print()
        resumeTrackingLog.write(resumeNumber + '\n')
        resumeTrackingLog.write(resumeDescription + '\n')

After executing and providing inputs, this is writing the following to the text file:

"None Project Manager None Product Manager None Senior Manager"

What I'm looking for is:

"Resume #1: Project Manager Resume #2: Product Manager Resume #3: Senior Manager"

Answer 1

The print function sends output to the console, but it does not return anything. In Python a function that doesn't explicitly return anything implicitly returns None .

You could easily replace it with an f-string:

resumeNumber = f'Resume #{count + 1}: '