fake_df=pd.DataFrame({'m':[100,120,101,200,201,501,350,420,525,500],
                  'n':[10.0,11.0,10.2,1.0,2.0,1.1,3.0,1.0,2.0,1.0],
                  'mod':[101.001,121.001,102.001,201.001,202.001,502.001,351.001,421.001,526.001,501.001]})
print fake_df