Best way to check if a directory is an brz branch

[Nicholas Allen]

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> 
> def is_branch(p):
>     from  bzrlib import (branch, errors)
>     try:
>         br, relpath = branch.Branch.open_containing(p)
>     except errors.NotBranchError:
>         return False
>     if relpath != '':
>         return False
>     else:
>         return True
> 
> should work.

Would I not need to catch other exceptions too? What if it is a branch
but there is a problem opening it? How do I know what open_containing(p)
will throw?

With Python being so lenient and unverbose about everything it makes
obtaining this information much harder. I really wish Bazaar had been
written in Java ;-)

Nick

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