As a python programmer, which packages have you used more frequently and those that have come handy ? which packages have solved your tricky problems ? which are some of the obscure and not-so-known packages that you have used ?
I second more_itertools. It has many useful functions such as chunked()/ichunked(), spy(), one(), only(), unique_everseen(), and unique_justseen(). Python 3.12 is only now getting an equivalent to chunked() as itertools.batched().