[Tutor] Filter question

[Kooser, Ara S]

Hello,

   I am new to python. I am trying to covert one file type to another
(molecular dynamics output to visualizer input). I have set up the following
filter, but it is not working. I don't receive an error message just a blank
prompt at shell. Here is the code. I am trying to filter out any line the
begins with I. I am using python 2.3.3. Thanks. 

Ara 

def filterFile(lmps, out):
    inp = open("lmps","r")
    outp = open("out","w")
    while 1:
        text = inp.readline()
        if line == "":
            break
        if line[0] == 'I':
            continue
        outp.write(line)
    
    inp.close()
    outp.close()
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