Question

Content of the file I want to read(d0.txt)

我正在学习python，我的作业如下所示。我不知道我在哪里犯了错误，它表明“类型'对象'NoneType'没有len（）”。任何人都可以帮我解释为什么它会显示此错误消息？

import sys
import os.path
# Add your function definitions here
def getData():
  fLocation="C://TEMP//"
  print("Assumed file location is at: ", fLocation)
  fName = input("\nPlease enter a file name with its extension (ex. XXX.txt): ")

  fin = open(fLocation + fName, 'r')

  aStr = fin.read()

  aList = aStr.split()

  aLen=len(aList)



def main():

  integersInAstr = getData()
  if (len(integersInAstr) == 0):
    print('*' * 30 + "\nReceived an empty string and no number to process, so the",
                                                            "program terminates.\n")
    sys.exit()
  else:
    print('*' * 30 + "\nReceived data items:\n" + integersInAstr)

BTW这是我执行程序时得到的：

假设文件位置位于：/ Users / Ivan / Desktop /

Please enter a file name with its extension (ex. XXX.txt): d0.txt
Traceback (most recent call last):
File "/Users/Ivan/Desktop/search.py", line 89, in
main( )
File "/Users/Ivan/Desktop/search.py", line 42, in main
if (len(integersInAstr) == 0):
TypeError: object of type 'NoneType' has no len()

为什么我的代码向我显示“类型对象'无类型'没有len（）”的错误消息？

0 个答案: