Regular expression OR in python findall

Question

I am trying to use the regualr expression

re.findall("void (D|S)TC_.+\(\)", testCaseFile)

My expectation is the above expression returns list

void DTC_Sample_01()
void STC_Sample_02()

But it should ignore

void ZTC_Sample_03() or any other.

But it is not working as expected

Answer 1

The parenthesis you are using tells findall() to match the pattern and give you back only the contents of the parenthesis. Using ?: you are matching the pattern as previously, but instead you get the whole match.

re.findall("void (?:D|S)TC_.+\(\)", testCaseFile)