How do you  reorder columns after join two pandas dataframes?
 Part 1: Intro to pandas data structures, covers the basics of the library's two main data structures-Series and DataFrames. Part 2: Working with DataFrames, dives a bit deeper into the functionality of DataFrames.It shows how to inspect, select, filter, merge, combine, and group your data.Part 3: Using pandas with the MovieLens dataset, applies the learnings of the first two parts in order to answer a few basic analysis questions about the MovieLens ratings data. 