Reading a file in an inner loop [solved]

eric dexter

my computer doesn't like this and hangs after creating a zero byte temp file. thanks for the help in advance

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def Del_Instr(from_file, instr):

    "del an instrument from a file dangerous indeed"

    infile = open(from_file, 'r')

    outfile = open('temp.tmp', 'w')

    instr_num = str(instr)

    for line in infile:

        if 'instr' in line:

           if instr_num in line:

              while not 'endin' in line:

                  pass                

           outfile.write(line)         

    close(infile)

    remove(from_file)

    rename('temp.tmp', from_file)

bartonc

creating an inner loop IS what you want to do, but

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              while not 'endin' in line:

                  pass

hangs because you never read any new lines.

I still recommend this inside the if block (you have found what you want copied)

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outfile.write(line)

try:

    while True:

        line = infile.next()

        outfile.write(line)

        if 'endin' in line:

            break

except StopIteration:

    print 'never found endin'

This way you get the first line written to the outfile plus the line that contains 'endin'.

bartonc

It's probably better to collect all the lines that you want into a list:

out_lines = []
...
out_lines.append(line)
...

if out_lines:
# open, write and close the outfile with whatever name you want.

eric dexter

I probily should of realized the infinite loop.. I will give this a try thanks alot for the help

creating an inner loop IS what you want to do, but

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              while not 'endin' in line:

                  pass

hangs because you never read any new lines.

I still recommend this inside the if block (you have found what you want copied)

Expand|Select|Wrap|Line Numbers

outfile.write(line)

try:

    while True:

        line = infile.next()

        outfile.write(line)

        if 'endin' in line:

            break

except StopIteration:

    print 'never found endin'

This way you get the first line written to the outfile plus the line that contains 'endin'.

Reading a file in an inner loop [solved]

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