String Replace Problem...

[andrea.gavana at agip.it]

Hello NG,

      probably this is a basic question, but I'm going crazy... I am unable
to find an answer. Suppose that I have a file (that I called "Errors.txt")
which contains these lines:

MULTIPLY
  'PERMX'  @PERMX1  1 34  1  20  1 6     /
  'PERMX'  @PERMX2  1 34  21 41  1 6     /
  'PERMX'  @PERMX3  1 34  1  20  7 14    /
  'PERMX'  @PERMX4  1 34  21 41  7 14    /
  'PERMX'  @PERMX5  1 34  1  20 15 26    /
  'PERMX'  @PERMX6  1 34  21 41 15 26    /
  'PERMX'  @PERMX7  1 34  1  20 27 28    /
  'PERMX'  @PERMX8  1 34  21 41 27 28    /
  'PERMX'  @PERMX9  1 34  1  20 29 34    /
  'PERMX'  @PERMX10  1 34  21 41 29 34    /
  'PERMX'  @PERMX11  1 34  1  20 35 42    /
  'PERMX'  @PERMX12  1 34  21 41 35 42    /
  'PERMX'  @PERMX13  1 34  1  20 43 53    /
  'PERMX'  @PERMX14  1 34  21 41 43 53    /
  'PERMX'  @PERMX15  1 34  1  20 54 61    /
  'PERMX'  @PERMX16  1 34  21 41 54 61    /
/

I would like to replace all the occurrencies of the "keywords" (beginning
with the @ (AT) symbol) with some floating point value. As an example, this
is what I do:

#  --- CODE BEGIN

import re
import string

# Set Some Dummy Parameter Values
parametervalues = range(1, 17)

# Open And Read The File With Keywords
fid = open("Errors.txt","rt")
onread = fid.read()
fid.close()

# Find All Keywords Starting with @ (AT)
regex = re.compile("[\@]\w+", re.IGNORECASE)
keywords = regex.findall(onread)

counter = 0

# Try To Replace The With Floats
for keys in keywords:
    pars = parametervalues[counter]
    onread = string.replace(onread, keys, str(float(pars)))
    counter = counter + 1

# Write A New File With Replaced Values
fid = open("Errors_2.txt","wt")
fid.write(onread)
fid.close()

#  --- CODE END


Now, I you try to run this little script, you will see that for keywords
starting from "@PERMX10", the replaced values are WRONG. I don't know why,
Python replace only the "@PERMX1" leaving out the last char of the keyword
(that are 0, 1, 2, 3, 4, 5, 6 ). These values are left in the file and I
don't get the expected result.

Does anyone have an explanation? What am I doing wrong?

Thanks to you all for your help.

Andrea.

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