Why is regexp not working?

[Florian Lindner]

Hello,

I have that piece of code:

    def _split_block(self, block):
        cre = [re.compile(r, flags = re.MULTILINE) for r in self.regexps]
        block = "".join(block)
        print(block)
        print("-------------------")
        for regexp in cre:
            match = regexp.match(block)
            for grp in regexp.groupindex:
                data = match.group(grp) if match else None
                self.data[grp].append(data)


block is a list of strings, terminated by \n. self.regexps:


self.regexps = [r"it (?P<coupling_iterations>\d+) .* dt complete yes | 
write-iteration-checkpoint |",
                r"it (?P<it_read_ahead>\d+) read ahead"


If I run my program it looks like that:


it 1 ahadf dt complete yes | write-iteration-checkpoint |
Timestep completed

-------------------
it 1 read ahead
it 2 ahgsaf dt complete yes | write-iteration-checkpoint |
Timestep completed

-------------------
it 4 read ahead
it 3 dfdsag dt complete yes | write-iteration-checkpoint |
Timestep completed

-------------------
it 9 read ahead
it 4 dsfdd dt complete yes | write-iteration-checkpoint |
Timestep completed

-------------------
it 16 read ahead
-------------------
{'it_read_ahead': [None, '1', '4', '9', '16'], 'coupling_iterations': ['1', 
None, None, None, None]}

it_read_ahead is always matched when it should (all blocks but the first). 
But why is the regexp containing coupling_iterations only matched in the 
first block?

I tried different combinations using re.match vs. re.search and with or 
without re.MULTILINE.

Thanks!
Florian