My first widget

This is a test.

$$x_{1,2} = \frac{-b\pm\sqrt{b^2-4ac}}{2a}$$

import numpy as np
import nbinteract as nbi

def normal(mean, sd):
    '''Returns 1000 points drawn at random fron N(mean, sd)'''
    return np.random.normal(mean, sd, 1000)

# Pass in the ‘normal‘ function and let user change mean and sd.
# Whenever the user interacts with the sliders, the
# ‘normal‘ function is called and the returned data are plotted.
nbi.hist(normal, mean=(0, 10), sd=(0, 2.0))