Example of using rank():

import pandas as pd

df = pd.DataFrame([[10, 20, 30, 40], [7, 14, 21, 28], [5, 5, 0, 0]],
                  columns=['Apple', 'Orange', 'Banana', 'Pear'],
                  index=['Basket1', 'Basket2', 'Basket3'])

print("\n--------- DataFrame Values--------\n")
print(df)

print("\n--------- DataFrame Values by Rank--------\n")
print(df.rank())

C:\pandas>python example.py
 
--------- DataFrame Values--------
 
         Apple  Orange  Banana  Pear
Basket1     10      20      30    40
Basket2      7      14      21    28
Basket3      5       5       0     0
 
--------- DataFrame Values by Rank--------
 
         Apple  Orange  Banana  Pear
Basket1    3.0     3.0     3.0   3.0
Basket2    2.0     2.0     2.0   2.0
Basket3    1.0     1.0     1.0   1.0
 
C:\pandas>