I have the following matched strings:
punctacros="Tasla"_TONTA
punctacros="Tasla"_SONTA
punctacros="Tasla"_JONTA
punctacros="Tasla"_BONTA
I want to replace only a part (before the underscore) of the matched strings, and the rest of it should remain the same in each original string.
The result should look like this:
TROGA_TONTA
TROGA_SONTA
TROGA_JONTA
TROGA_BONTA
Edit:
This should work:
from re import sub
with open("/path/to/file") as myfile:
lines = []
for line in myfile:
line = sub('punctacros="Tasla"(_.*)', r'TROGA\1', line)
lines.append(line)
with open("/path/to/file", "w") as myfile:
myfile.writelines(lines)
Result:
TROGA_TONTA
TROGA_SONTA
TROGA_JONTA
TROGA_BONTA
Note however, if your file is exactly like the sample given, you can replace the re.sub line with this:
line = "TROGA_"+line.split("_", 1)[1]
eliminating the need of Regex altogether. I didn't do this though because you seem to want a Regex solution.
mystring.replace('punctacross="Tasla"', 'TROGA_')
where mystring is string with those four lines. It will return string with replaced values.
If you want to replace everything before the first underscore, try this:
#! /usr/bin/python3
data = ['punctacros="Tasla"_TONTA',
'punctacros="Tasla"_SONTA',
'punctacros="Tasla"_JONTA',
'punctacros="Tasla"_BONTA',
'somethingelse!="Tucku"_CONTA']
for s in data:
print('TROGA' + s[s.find('_'):])
