AttributeError: '_io.TextIOWrapper' 对象没有 txt 文件的属性 'lower'

Question

Here is my code (A pig Latin translator from a text file):

f = open('Assignment_4.txt', 'r+')

for line in f:
    print(line)

def pigLatin():
    var = 'ay'
    wordL = f.lower()
    firstLetter = wordL[0]
    pigLatin = wordL + firstLetter + var
    pigLatin = pigLatin[1:]
    print(pigLatin)

It works for defined strings but won't for the file. Help is appreciated!

Answer 1

Points:

• lower() works with string. You are trying to use with file handle f . That's why you are getting this error.
• Also, after reading file line by line, you should call pigLatin() for each line as pigLatin(line) . So, now , pigLatin() function expects one argument.
• Also, close the file at the end as f.close() . It will be if you use with statement to open file.

Code with comments inline:

def pigLatin(stuff_to_be_changed):
    var = 'ay'
    wordL = stuff_to_be_changed.lower()
    firstLetter = wordL[0]
    pigLatin = wordL + firstLetter + var
    pigLatin = pigLatin[1:]
    print(pigLatin)


#For string

string =  "I am to change"
#Call function
pigLatin(string)

f = open('Assignment_4.txt', 'r+')

#For file
for line in f:
    print(line)
    #Call function
    pigLatin(line)

#Close the file
f.close()

Answer 2

The error is quite right - file objects don't have a lower() method - before you can use your function you need to read a line of text from your file and split it into separate words. (Note that it is never a good idea to use the same name for a variable and a method as it can cause confusion.)