e that there are 512 films in the dataset that had no revenue in the United States. However, the highest budget films with no revenue have a release date AFTER&nbsp;the date on which the dataset was compiled (May 1st, 2018). </p><pre class="prettyprint linenums">zero_domestic = data[data.USD_Domestic_Gross == 0]
print(f'Number of films that grossed $0 domestically {len(zero_domestic)}')
zero_domestic.sort_values('USD_Production_Budget', ascending=False)</pre><figure><img src="https://img-c.udemycdn.com/redactor/raw/2020-10-14_17-45-10-325d5e70022e4c7919caf7e6713d14ce.png"></figure><p><strong>Solution to Challenge 3:&nbsp;No worldwide revenue</strong></p><p>When we check worldwide revenue instead, we see that there are 357 films that made no money internationally. Once again, some of the films have not been released yet at the time the data was compiled. However, 512 versus 357. Why is there a difference?&nbsp;</p><p>The reason some international films were never screened in the United States.&nbsp; In fact, we can see an example of this in our previous screenshot. "Don Gato, el inicio de la pandilla" made about $4.5 million dollars in the box office, but nothing in the United States. Perhaps they should have screened it there too, considering it cost $80 million to make! </p><pre class="prettyprint linenums">zero_worldwide = data[data.USD_Worldwide_Gross == 0]
print(f'Number of films that grossed $0 worldwide {len(zero_worldwide)}')
zero_worldwide.sort_values('USD_Production_Budget', ascending=False)</pre><figure><img src="https://img-c.udemycdn.com/redactor/raw/2020-10-14_17-49-17-c0c42e8a463d6d79a09dadfe670a1b07.png"></figure>