CODEWITHSUNDEEP
pythonregex
Nanthini Muniapan
Nanthini Muniapan

Reputation: 456

Help correct existing regex to substitute a string value

I am new to python and I have been trying to check and substitute a specific value for a string. To illustrate, let me paste the bit of code that I used:- 

 var1 = re.sub(r'\$this->getSomething()->getSomethingElse()->(.*?)', r'\1', var1)

What I am trying to do here is to replace the entire string(var1) with the value contained within (.*?). E.g if the string is in this format "$this->getSomething()->getSomethingElse()->__('Title')" then the new value for var1 should be "__('Title')." At the moment I can't figure out what's wrong with the code and I tried searching all over the place including stackoverflow but not to avail.

Note : This seems to work well though :-

value = re.sub(r"\$title", "$this->title", value)

I hope someone can help me with this problem or at least direct me in the right direction. Thanks in advance.

Upvotes: 1

Views: 118

Answers (1)

outis
outis

Reputation: 77400

Parentheses are metacharacters, used for grouping. You also want to match literal parentheses, which means you need to escape some instances. Try:

var1 = re.sub(r'\$this->getSomething\(\)->getSomethingElse\(\)->(.*?)', r'\1', var1)

Note that this particular statement is equivalent to:

var1 = re.sub(r'\$this->getSomething\(\)->getSomethingElse\(\)->', '', var1)

and:

var1 = var1.replace('$this->getSomething()->getSomethingElse()->', '')

Upvotes: 1

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