Create dataframe through Dictionary in pandas

[ift38375]

Hi,

I have given below table and i want to create dataframe of this table using Dictionary:

          2019        2017        2015       2013      2011
qtr1      61000       44900       5000       5000      5000
qtr3      NaN         57000       5000       5000      5000
qtr4      NaN         59000       5000       5000      5000
qtr       NaN         NaN         NaN        NaN       NaN

I am using given below code but no luck :

import pandas as pd
df2 = { 2019 :{ 'qtr1':61000, } ,
        2017 :{ 'qtr1':44900,'qtr3':57000,'qtr4':59000},
        2015 :{ 'qtr1':5000,'qtr3':5000,'qtr4':5000},
        2013 :{ 'qtr1':5000,'qtr3':5000,'qtr4':5000},
        2011 :{ 'qtr1':5000,'qtr3':5000,'qtr4':5000}
        }
ndf = pd.DataFrame(df2)
print(ndf)

How can i declare whole row of "qtr' as NaN here i am confused ?