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AttributeError: 'str' object has no attribute 'insert'

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Join Date: Apr 2009
Posts: 3
Reputation: MaQleod is an unknown quantity at this point 
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MaQleod MaQleod is offline Offline
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AttributeError: 'str' object has no attribute 'insert'

 
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  #1
Apr 5th, 2009
I'm fairly new to python and object oriented programming in general, so I'm having a little trouble figuring out why this doesn't work

this is the error I'm getting for the code below:
Error: 'str' object has no attribute 'insert'

Python Syntax (Toggle Plain Text) 
  1. filetolist = FileReadToList("test.txt")
  2. print filetolist[0]
  3.  
  4. def FileCountLines(s_filename):
  5. 	f = open(s_filename)
  6. 	filestring = f.read()
  7. 	count = operator.countOf(filestring, "\n")
  8. 	file.close(f)
  9. 	return count
  10.  
  11. def FileReadToList(s_filename):
  12. 	f = open(s_filename)
  13. 	count = FileCountLines(s_filename)
  14. 	filestring = f.read()
  15. 	filestring.insert(0,count)
  16. 	file.close(f)
  17. 	return filestring
Last edited by MaQleod; Apr 5th, 2009 at 11:33 pm.
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Join Date: Mar 2007
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solsteel solsteel is offline Offline
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Re: AttributeError: 'str' object has no attribute 'insert'

 
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  #2
Apr 6th, 2009
Change
Python Syntax (Toggle Plain Text) 
  1. filestring = f.read()
to
Python Syntax (Toggle Plain Text) 
  1. filestring = f.readlines()

-BV
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Re: AttributeError: 'str' object has no attribute 'insert'

 
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  #3
Apr 6th, 2009
thanks, that worked, why does that make a difference?
I'd like to understand exactly what is going on.
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Re: AttributeError: 'str' object has no attribute 'insert'

 
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  #4
Apr 6th, 2009
The readlines() file method returns a list. The read() method returns a string. A str object has no insert() method but a list object does.
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Re: AttributeError: 'str' object has no attribute 'insert'

 
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  #5
Apr 6th, 2009
makes sense, thanks again
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