Add missing stdlib functions.
Add missing stdlib functions.

cderici/pycket,magnusmorton/pycket,krono/pycket,cderici/pycket,samth/pycket,samth/pycket,krono/pycket,pycket/pycket,vishesh/pycket,magnusmorton/pycket,krono/pycket,cderici/pycket,vishesh/pycket,magnusmorton/pycket,pycket/pycket,samth/pycket,pycket/pycket,vishesh/pycket