从数据集中提取后如何可视化保存的数据

Question

Basically I want to extract the highest value count of the genre for each year and then plot it in a bar chart to answer the question - Which genre is most popular from year to year?

Answer 1

First idea is create 3 columns DataFrame by # Series.reset_index , remove duplicates by DataFrame.drop_duplicates and reshape by DataFrame.pivot :

df = (temp_1.reset_index(name='count')
            .drop_duplicates('release_year')
            .pivot('release_year','genres','count'))

Or remove duplicates in MultiIndex by Index.get_level_values with Index.duplicated and boolean indexing , reshape by Series.unstack and last create 3 columns DataFrame :

df = (temp_1[~temp_1.index.get_level_values('release_year').duplicated()]
            .unstack()
            .reset_index(name='count'))

Last plot by DataFrame.plot.bar :

df.plot.bar()