How to replace variable in string in a list

Question

I have a list called x below and I want to replace the ">" (in x[0][0]) with the integer 1.

x = [">000#","#0#00","00#0#"]

I tried x[0][0] = 1 but it gives me an error.

Also, can I make x[0][2] to become an integer such that x[0][2] += 1 becomes this: x = ["1010#","#0#00","00#0#"]

Does this answer your question? [Changing one character in a string in Python](https://stackoverflow.com/questions/1228299/changing-one-character-in-a-string-in-python) — Thomas Schillaci, Mar 12 '20 at 12:55
no i want to know if it can make each individual variable an integer to do addition — SomeRandomPerson D, Mar 12 '20 at 13:08
You probably want to consider converting each of those strings into a list then. — dspencer, Mar 12 '20 at 13:14

Nick · Answer 1 · 2020-03-12T13:27:37.183

1

Python strings are immutable; you cannot change their contents. Instead, you need to make a new string out of the old one and assign that to x[0]:

x = [">000#","#0#00","00#0#"]
# change the first character to a '1'
x[0] = '1' + x[0][1:]
# add 1 to the third character
x[0] = x[0][:2] + str(int(x[0][2]) + 1) + x[0][3:]
print(x)

Output:

['1010#', '#0#00', '00#0#']

edited Mar 12 '20 at 13:27

answered Mar 12 '20 at 12:57

Nick

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SomeRandomPersonD Please see my edit, it also addresses the second part of your question – Nick Mar 12 '20 at 13:28

vks · Accepted Answer · 2020-03-12T13:19:29.710

1

You can try

 x[0]=x[0].replace(">","1")

Strings are immutable so cant be changed like list.

Or you can convert to list.

x[0]=list(x[0])
x[0][0]="1"
x[0][2]=str(int(x[0][2])+1)
x[0]="".join(x[0])

edited Mar 12 '20 at 13:19

answered Mar 12 '20 at 12:58

vks

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but i cant edit individual variable? for example, i want to do this: ```x[0][2] += 1``` such that it becomes this: ```x = ["1010#","#0#00","00#0#"]``` – SomeRandomPerson D Mar 12 '20 at 13:06
@SomeRandomPersonD check edit – vks Mar 12 '20 at 13:19

How to replace variable in string in a list

2 Answers2