CODEWITHSUNDEEP
pythoninsertcharacter
RRR
RRR

Reputation: 339

Insert characters in a string using python

Here is what I am trying to achieve: I want to replace 

void some_function(int,  int *, float);

with 

void some_function(int a, int *b, float c);

So far, I have tried to replace "," with chr(97+i) as I loop through the string. 

text = len("void some_function(int,  int *, float);")
i = 0
for j in range(0, length)
    if text[j] == ",":
       rep = " " + chr(97+i) + " .,"
       text = text.replace("," rep)
       i = i + 1
       j = 0 # resetting the index, but this time I want to find the next occurrence of "," which I am not sure

But this is not doing the job. Please let me know if there is a better way of doing this.

Upvotes: 1

Views: 2680

Answers (3)

Sebastian Kreft
Sebastian Kreft

Reputation: 8189

The original idea does not work, since the last parameter is not followed by a ',' but by a ')'.

import re
import string

def fix(text):
    n = len(re.findall('[,(]', text))
    return re.sub('([,)])', ' %s\\1', text) % tuple(string.letters[:n])

Upvotes: 0

Aleksei astynax Pirogov
Aleksei astynax Pirogov

Reputation: 2491

text = "void some_function(int,  int *, float);".replace(',', '%s,') % (' a', 'b')

Upvotes: 1

Eric
Eric

Reputation: 97571

import re

i = 96
def replace(matches):
    global i
    i += 1
    return " " + chr(i) + matches.group(0)

re.sub(',|\)', replace, "void some_function(int,  int *, float);")

Upvotes: 1

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