To import all numpy modules at once instead of one at a type as needed, type from numpy import *. The import * command is  dangerously  convenient — we will sometimes use it ourselves, being not as pure in thought as others might be on this issue— but take two considerations in mind: (1) you are importing code you don't need  in addition to that you do, and (2) if you have any already defined  functions that have the same name as a numpy function, those functions will be overwritten.  This is particularly prone to happen with mathematical functions. For example, the math package math, the complex mathematics package cmath, the numerical python package numpy, and the numerical calculation of uncertainties package uncertainties all have trigonometric functions called sin and cos!  If you only need the sine  and cosine functions from the numerical python package numpy but , typing from numpy import sin, cos  
The second method requires a prefix before each use of a module. We call this the traditional numpy import style