> Hello, i'm looking to find and replace multiple characters in a text
> file (test1). I have a bunch of random numbers and i want to replace
> each number with a letter (such as replace a 7 with an f and 6 with a
> d). I would like a suggestion on an a way to do this. Thanks
Well, the canonical way would be to use a tool designed to do
transformations:
tr '76' 'fd' < test1.txt > out.txt
However, if it's python you want:
>>> mapping = {'7': 'f', '6': 'd'}
>>> s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
>>> ''.join([mapping.get(c, c) for c in s])
'ABCDEFGHIJKLMNOPQRSTUVWXYZ12345df890'
will transform all the items found in "s" according to the
defined mapping.
Or, depending on your string length and the number of items
you're replacing:
>>> for k,v in mapping.items(): s = s.replace(k,v)
may be a better choice. Or maybe they're both lousy choices. :)
Time it and choose accordingly.
-tkc
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