How to replace empty dictionary with values in pandas


Low:

I have the following:

pd.DataFrame({
    'a' : { 1 : {}},
    'b' : {1 : 3}
})

look like:

    a  b
1  {}  3

and would like to be able to replace it {}with 0 or NaN , but I'm not sure how to do it. I can't .replaceseem to use

pd.DataFrame({
    'a' : { 1 : {}},
    'b' : {1 : 3}
}).replace({ {} : 0})

gives error

BEN_YO:

You can use bool dictwhich will return when emptyFalse

df=df.where(df.astype(bool),0)

df
Out[26]: 
   a  b
1  0  3

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