(easy question) Find and replace multiple items

[ds4ff1z]

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

[Mark Peters]

ds4ff1z wrote:

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

how about:

>>import string
text1 = "foo bar 12 spam joe876"
table = string.maketrans("0123456789","uydnwkdfpx")
text1.translate(table)

'foo bar yd spam joepfd'

Mark Peters

[Simon Forman]

ds4ff1z wrote:

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

http://aspn.activestate.com/ASPN/Coo...n/Recipe/81330

[Tim Chase]

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

[ds4ff1z]

Tim Chase wrote:

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

Thanks for the solutions!