Python 1.5.2->2.0 documented incompat.?

Sun Oct 22 08:42:27 EDT 2000

Daniel Hops wrote:
> I just installed the new Pyton 2.0 on my SUN Solaris machine and tried
> my current script with it, but got an error.
> Changing the 1st line of the script back to 1.5.2 binary helps.
> The error is related with regular expression matching.

quoting the documentation:

    Implementation note: The re module has two distinct
    implementations: sre is the default implementation and
    includes Unicode support, but may run into stack limitations
    for some patterns. Though this will be fixed for a future
    release of Python, the older implementation (without
    Unicode support) is still available as the pre module.

to use pre in a single script, just replace "import re" with
"import pre as re"

> I get an attribute error: "None has no attribute group"

this means that you didn't check the return value; match and
search returns None if the pattern didn't match.

> And that is the precompiled r.e.:
> all = re.compile
> ("(?P<head>\A.*?</TR>\s+)(?P<main>.*?)(?P<bottom></TABLE>(?!.*</TABLE>).*)",
> re.S)

there are way too many ".*"s in that pattern for me to tell why
you're getting this error...  can you come up with a self-contained
sample script? (if so, mail it to me or post it to the bug manager at
sourceforge).

</F>