I enjoy using the interactive Python console as a calculator, but typing python3 and then from math import * was annoying. So I scripted it into a simple command I’ve named cpy. Maybe someone else can use it.

#!/usr/bin/env python3
import code
import readline
import rlcompleter

# Directly import all the math functions
from math import *

print("Interactive Python 3 with 'from math import *'")

vars = globals()
readline.parse_and_bind("tab: complete")
shell = code.InteractiveConsole(vars)

The list of functions available in the Python3 math library. The script is also available as a Github Gist.

Example use:

$ cpy
Interactive Python 3 with 'from math import *'
Python 3.4.3 (default, Oct 14 2015, 20:28:29)
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> pi*5**2 # sqft area of a 10ft circle
>>> sqrt(100/pi) # radius of a 100 sqft circle