Reading from a file and converting it into a list of lines: code not working

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    Girish> I have a text file in the following format:
    Girish> 1,'a',2,'b'
    Girish> 3,'a',5,'c'
    Girish> 3,'a',6,'c'
    Girish> 3,'a',7,'b'
    Girish> 8,'a',7,'b'
    Girish> .
    Girish> .
    Girish> .
    Girish> Now i need to generate 2 things by reading the file:
    Girish> 1) A dictionary with the numbers as keys and the letters as values.
    Girish> e.g the above would give me a dictionary like
    Girish> {1:'a', 2:'b', 3:'a', 5:'c', 6:'c' ........}
    Girish> 2) A list containing pairs of numbers from each line.
    Girish> The above formmat would give me the list as
    Girish> [[1,2],[3,5],[3,6][3,7][8,7]......]

Running this:

    open("some.text.file", "w").write("""\
    1,'a',2,'b'
    3,'a',5,'c'
    3,'a',6,'c'
    3,'a',7,'b'
    8,'a',7,'b'
    """)

    import csv

    class dialect(csv.excel):
        quotechar = "'"
    reader = csv.reader(open("some.text.file", "rb"), dialect=dialect)
    mydict = {}
    mylist = []
    for row in reader:
        numbers = [int(n) for n in row[::2]]
        letters = row[1::2]
        mydict.update(dict(zip(numbers, letters)))
        mylist.append(numbers)

    print mydict
    print mylist

    import os

    os.unlink("some.text.file")

displays this:

    {1: 'a', 2: 'b', 3: 'a', 5: 'c', 6: 'c', 7: 'b', 8: 'a'}
    [[1, 2], [3, 5], [3, 6], [3, 7], [8, 7]]

That seems to be approximately what you're looking for.

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