* [EMAIL PROTECTED] ([EMAIL PROTECTED]) wrote: > Hello: > I have next dictionaries: > a={'a':0, 'b':1, 'c':2, 'd':3} > b={'a':0, 'c':1, 'd':2, 'e':3} > I want to put in a new dictionary named c all the keys that are in b > and re-sequence the values. The result I want is: > c={'a':0, 'c':1, 'd':2} > How can I do this with one line of instruction? > > I attempted the next but the output is not the expected: > c=dict([(k,v) for v,k in enumerate(a) if b.has_key(k)]) > erroneously (for me) gets: > {'a': 0, 'c': 2, 'd': 3}
I am not 100% I understand your questions, but k,v are being pulled from a, try: c=dict([(k,b[k]) for v,k in enumerate(a) if b.has_key(k)]) mike -- http://mail.python.org/mailman/listinfo/python-list