cab938

#!pip install html5lib #install html5lib, only needs to be run once
import pandas as pd
import numpy as np
df=pd.read_html('https://proxy.mentoracademy.org/getContentFromUrl/?userid=brooks&url=https://en.wikipedia.org/wiki/List_of_natural_satellites', header=0)
moons=df[4][1:] #drop prehistoric moon sighting
moons=moons['Discovery year'] #we are only interested in the year discovered

moons=moons.apply(lambda x: x.split('/')[0]).astype(int) #clean dataframe to just years as ints
pre_2000=len(moons[moons<2000]) #select only that data from moons which is less than 2000
post_2000=len(moons[moons>=2000]) #select only that data from moons which is greater than or equal to 2000