string replace

[Michele Petrazzo]

Hi,
a lot of times I need to replace more than one char into a string, so I
have to do something like

value = "test"
chars = "e"
for c in chars:
value = value.replace(c, "")

A solution could be that "replace" accept a tuple/list of chars, like
that was add into the new 2.5 for startswith.

I don't know, but can be this feature included into a future python release?

Thanks,
Michele

[Schüle Daniel]

A solution could be that "replace" accept a tuple/list of chars, like
that was add into the new 2.5 for startswith.

I don't know, but can be this feature included into a future python
release?
I don't know, but I think it would be useful

as for now I use this

import re
chars = re.compile(r'[abc]')
text = "aAbBcCdD"
chars.sub("",text) 'ABCdD'

Thanks,
Michele

Regards, Daniel

[Tim Chase]

> a lot of times I need to replace more than one char into a

string, so I have to do something like

value = "test"
chars = "e"
for c in chars:
value = value.replace(c, "")

A solution could be that "replace" accept a tuple/list of
chars, like that was add into the new 2.5 for startswith.

I don't know, but can be this feature included into a future
python release?

Well, another way of doing it would be

values = "this is a test"
chars = "aeiou"
"".join([c for c in values if c not in chars]) 'ths s tst'

If your either your chars is a large set or you're performing
this repeatedly with the same set of chars, you might want the
speed of membership-testing that one would get from a true set:
charset = set(chars) # do this once for the set
# do the following as many times as you like in loops, etc.
"".join([c for c in values if c not in charset])

'ths s tst'

HTH,

-tkc

[Jim Segrave]

In article <1a********************@twister2.libero.it>,
Michele Petrazzo <mi**************@TOGLIunipex.it> wrote:

Hi,
a lot of times I need to replace more than one char into a string, so I
have to do something like

value = "test"
chars = "e"
for c in chars:
value = value.replace(c, "")

A solution could be that "replace" accept a tuple/list of chars, like
that was add into the new 2.5 for startswith.

I don't know, but can be this feature included into a future python release?

Let's say you want to make every vowel uppercase:

import string

trans_table = string.maketrans('aeiou', 'AEIOU')
"I don't know, but can be this feature included into".translate(trans_table)

prints:
"I dOn't knOw, bUt cAn bE thIs fEAtUrE InclUdEd IntO"

That more than addresses your requirements, as it can do multiple
character substitutions multiple times in one call.


--
Jim Segrave (je*@jes-2.demon.nl)

[johnzenger]

Check out the .translate method and the string.maketrans documentation.
You can use it to delete a list of characters all in one line:

s = "I am the walrus"
import string
s.translate(string.maketrans("",""),"aeiou")

'I m th wlrs'

Michele Petrazzo wrote: Hi,
a lot of times I need to replace more than one char into a string, so I
have to do something like

value = "test"
chars = "e"
for c in chars:
value = value.replace(c, "")

A solution could be that "replace" accept a tuple/list of chars, like
that was add into the new 2.5 for startswith.

I don't know, but can be this feature included into a future python release?

Thanks,
Michele

[Michele Petrazzo]

jo********@gmail.com wrote:

Check out the .translate method and the string.maketrans documentation.
You can use it to delete a list of characters all in one line:

Yes. This is, more or less, what I were looking for.

P.s. Sure, if replace could accept a tuple... :)

Thanks to all,
Michele