On 09/12/2013 20:36, Logan Collins wrote:
Just checking whether 1) a PEP is the proper place for this and 2) what
y'all think about it.
I would like to propose a change to the the 're' standard library to
support iterables.
So, something like the following would work:
import re
text = """hello user
hello user
hello user"""
users = ["Bob", "Alice", "Jeffery"]
newtext = re.sub("user", users, text)
# newtext = "hello Bob\nhello Alice\nhello Jeffery"
There are a few corner cases I'm not sure what would be the best
behavior. Nor am I entirely certain this should be modified
functionality or just... a new function. What do y'all think?
What's your use-case? How often would someone want to do this?
Here's a way of doing it without adding to the re module:
import re
text = """hello user
hello user
hello user"""
class Replacement:
def __init__(self, users):
self.users = users
self.index = -1
def __call__(self, m):
self.index += 1
return self.users[self.index]
users = ["Bob", "Alice", "Jeffery"]
newtext = re.sub("user", Replacement(users), text)
# newtext = "hello Bob\nhello Alice\nhello Jeffery"
print(newtext)
The search string is a simple literal, so another way is:
from itertools import chain
text = """hello user
hello user
hello user"""
users = ["Bob", "Alice", "Jeffery"]
# newtext = "hello Bob\nhello Alice\nhello Jeffery"
newtext = "".join(chain(*zip(text.split("user", len(users)), users)))
print(newtext)
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