[Tutor] "TypeError: open, argument 1: expected string, file found"

[Marcel Preda]

> Mr. Gauld and everyone else on the list,
>
> I am sure someone can offer a quick solution to this one...
>
> I am working my way through the last half of Alan Gauld's "Case Study"
> section in his Learning to Program tutorial and I am having a problem with
> the document module. I've posted my slightly altered version at the address
> below.
>
> http://www.asahi-net.or.jp/~ns7s-ickw/python/document.py
>
> When I try to run it I get the following error:
>
> >>> Traceback (innermost last):
>   File "C:\Program Files\Python\Pythonwin\pywin\framework\scriptutils.py",
> line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "D:\Python\document.py", line 124, in ?
>     D = HTMLDocument(file)
>   File "D:\Python\document.py", line 12, in __init__
>     self.infile = open(filename, "r")
> TypeError: open, argument 1: expected string, file found
> >>>
>
> If you see any other problems I am going to run into, I would of course
> appreciate the head's up.
>
> Thank you in advance,


Your class HTMLDocument inherits class TextDocument which inherits Document
class

The __init__ method in Document class expect a string (filename)
def __init__(self, filename):
        self.filename = filename
        self.infile = open(filename, "r")

On the other side when you create the `D' object you pass a `file' object

enterfile = raw_input("Enter file: ")
file = open(enterfile, "r")
D = HTMLDocument(file)
So, at the end you will call __init__(self,file)  (and file is a `file type' not
a `string')

What  could you do?

#1 Modify the __init_ method in Document class is not a good idea

#2 create `D' like this:
enterfile = raw_input("Enter file: ")
D = HTMLDocument(enterfile)
#`enterfile' is a string


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