[SOLVED] Python loop through dictionary

[The Little Guy]

Why does this work:

m = re.search("(create database) (.*)", cmd)
print m.group(2)

 

And this doesn't work:

commands = {"(create database) (.*)": "create database", "(drop database) (.*)": "drop database"}
        for k, v in commands.iteritems():
                key = str(k)
                m = re.search(key, cmd)
                print m.group(2)

 

I get this error:

 

    print m.group(2)

AttributeError: 'NoneType' object has no attribute 'group'

 

 

What is supposed to happen is that the loop will loop through my dictionary, and do a regular expression on each item until it finds the correct item, but it cant do that for some reason, any one have any ideas?

[corbin]

If no match is found, a Match object is not returned.  It would appear that no Match object is being returned since group is not a method.

[The Little Guy]

OK, so what I did was put it inside a try catch block, and it works, so it now looks like this:

 

            try:
                if m.group(1) == key:
                    mainCmd = key
                    value = m.group(2)
                    break
            except:
                continue