Remove the observations with 0 entries. 
import pandas as pd

battle = pd.read_csv('battledeath_1.csv', low_memory = False)


battle_without_duplicate = battle.drop_duplicates()

I have dropped the duplicates in the original csv file but now i am asked to delete the entries that have zero in its values. They are just 2 columns, one being the name of the country and the other being the value in it. I need help in taking out the rows with zero in them... 