读取文件时，Python提取单个字符串

Question

I am brand new to Python. I am working through an example on reading files and I've been looking at this for a while and can't figure out what I am doing wrong. What I am trying to do is follow the same logic as if I were searching for a string from a source file to see if it exists in a destination file. Think of it a my source file being the string dictionary and the destination file being the data file that the strings will be searched for. That seems to be working, but what I now want to do is pass each of the strings one at a time to a custom module called diff to compare those strings. What is happening now is that it's throwing the results off because i'm passing a list of strings instead of one at a time. How do I pass the strings one at a time to my diff command below.

with open('./dic') as f:
    dictionary = f.read()

if not dictionary:
    sys.exit("Could not read dictionary data :-(")

with open('./dat') as f:
    for dataFile in (line.strip() for line in f):
        print 'dataFile: ', dataFile
        print 'dictionary: ', dictionary
        score=diff.dataL(dataFile, dictionary)
        print 'Diff score: ', score

For example my output looks like this - as you can see it's passing 3 items every time for dictionary instead of 1.

dataFile:  aaaa
dictionary:  aaaa
bbbb
cccc

dataFile:  test test
dictionary:  aaaa
bbbb
cccc

dataFile:  fail fail
dictionary:  aaaa
bbbb
cccc

Thanks for the help!

Answer 1

Your variable dictionary is actually a String, so it is technically one item. If you want to make it a list, for example to iterate over, you can do this:

dictionary_list = dictionary.split()

This will make every string separated by whitespace in the String dictionary into an item in the list dictionary_list.

Answer 2

For this line:

dictionary = f.read()

You want to use the readlines method that returns all lines in a list

Not the read method that returns all the file content in a string