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insert chars into string

hi
is there a string method to insert characters into a string?
eg
str = "abcdef"
i want to insert "#" into str so that it appears "abc#def"

currently what i did is convert it to a list, insert the character
using insert() and then join them back as string..
thanks

Mar 18 '06 #1
2 46728
Em Sex, 2006-03-17 *s 17:32 -0800, ei***********@yahoo.com escreveu:
is there a string method to insert characters into a string?


As far as I know, no. Strings are immutable in Python. That said, the
following method may do what you want:

def insert(original, new, pos):
'''Inserts new inside original at pos.'''
return original[:pos] + new + original[pos:]

Mar 18 '06 #2
ei***********@yahoo.com schrieb:
hi
is there a string method to insert characters into a string?
eg
str = "abcdef"
i want to insert "#" into str so that it appears "abc#def"

currently what i did is convert it to a list, insert the character
using insert() and then join them back as string..


If you are frequently want to modify a string in such a way, that this
is the recommended way to do so. It might be that there are
mutable-string implementations out there that make that easier for you -
but in the end, it boils down to using list, so that the overhead of
concatenating strings is encountered only once, on the end when you
actually need the result.

Diez

Mar 18 '06 #3

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