New to Python. For in loops curiosity

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Subject	New to Python. For in loops curiosity
From	Leonardo Petry <leonardo.petry.br@gmail.com>
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Hi All,

So I am starting with python and I have been working on some simple exercises.

Here is something I found curious about python loops

This loop run each character in a string

def avoids(word,letters):
	flag = True
	for letter in letters:
		if(letter in word):
			flag = False
	return flag

The loop below (at the bottom) runs each line of the file

fin = open('wordplay.txt');
user_input = raw_input('Enter some characters: ')
count = 0
for line in fin:
    word = line.strip()
    if(avoids(word, user_input)):
    	count += 1;

This is just too convenient. 
Basically my question is: Why is python not treating the contents of wordplay.txt as one long string and looping each character?

Any comment is greatly appreciate. Thanks

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New to Python. For in loops curiosity Leonardo Petry <leonardo.petry.br@gmail.com> - 2014-05-13 20:38 -0700
  Re: New to Python. For in loops curiosity John Gordon <gordon@panix.com> - 2014-05-14 03:46 +0000
  Re: New to Python. For in loops curiosity Rustom Mody <rustompmody@gmail.com> - 2014-05-13 20:48 -0700
  Re: New to Python. For in loops curiosity Ian Kelly <ian.g.kelly@gmail.com> - 2014-05-13 21:49 -0600
  Re: New to Python. For in loops curiosity Ben Finney <ben@benfinney.id.au> - 2014-05-14 14:03 +1000
  Re: New to Python. For in loops curiosity Roy Smith <roy@panix.com> - 2014-05-14 07:38 -0400
  Re: New to Python. For in loops curiosity Ned Batchelder <ned@nedbatchelder.com> - 2014-05-14 09:41 -0400

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