I want to delete i.e. character number 5 in a string. So I did:
del line[5]
and got: TypeError: 'str' object doesn't support item deletion
So no I wonder whether there is a different efficient solution to the problem.
Add a comment
|
3 Answers
Strings are immutable in Python, so you can't change them in-place.
But of course you can assign a combination of string slices back to the same identifier:
mystr = mystr[:5] + mystr[6:]
3 Comments
David
Thanks! Makes sence. Imagine if your answer could get integrated into the python error message. And image if that error message was some kind of a community wiki so I could integrate it myself. I can accept the answer in 5 minutes.
Tim Pietzcker
@David: The immutability of certain basic Python types (especially strings and tuples) is something that baffles many newcomers to the language, but which makes a lot of sense and is a fundamental Python concept. After all, you don't expect to be able to change integer values in-place, either. So this is considered basic Python knowledge; the error message is clear enough for my taste.
David
I agree that it is clear, one cannot write everything in error message. But just imagine if all error messages contained a web link to a wiki page where all information/solutions about the problem could be included.
I use a function similar to :
def delstring(mystring, indexes):
return ''.join([let for ind, let in enumerate(mystring) if ind not in indexes])
indexes should be an iterable (list, tuple..)
Comments
bytearray is a type which can be changed in place. And if you are using Python2.x, it can very easily convert to default str type: bytes.
b=bytearray(s)
del b[5]
s=str(b)
