How to reorder indexed rows based on a list in Pandas data frame

Question

I have a data frame that looks like this:

company  Amazon  Apple  Yahoo
name
A             0    130      0
C           173      0      0
Z             0              


        

Answer 1

You could set index on predefined order using reindex like

In [14]: df.reindex(["Z", "C", "A"])
Out[14]:
company  Amazon  Apple  Yahoo
Z             0      0    150
C           173      0      0
A             0    130      0

However, if it's alphabetical order, you could use sort_index(ascending=False)

In [12]: df.sort_index(ascending=False)
Out[12]:
company  Amazon  Apple  Yahoo
name
Z             0      0    150
C           173      0      0
A             0    130      0

Like pointed below, you need to assign it to some variable

In [13]: df = df.sort_index(ascending=False)