not supported between instances of 'str' and 'float'

Question

While handling with missing data for below columns from csv file it throws TypeError.How to resolve this ?

trainData.Gender.fillna(trainData.Gender.max(),inplace =True)
trainData.Married.fillna(trainData.Married.max(),inplace=True)

TypeError: '>=' not supported between instances of 'str' and 'float'

trainData.dtypes
    Loan_ID               object
    Gender                object
    Married               object
    Dependents            object
    Education             object
    Self_Employed         object
    ApplicantIncome        int64
    CoapplicantIncome    float64
    LoanAmount           float64
    Loan_Amount_Term     float64
    Credit_History       float64
    Property_Area         object
    Loan_Status           object

Answer 1

Doing it that way you are actually considering missing data(NaN, which are treated as floats) to look for the maximum value. So:

trainData.Gender.fillna(trainData.Gender.max(),inplace =True)

will try to compare str vs. floats.

You need to do:

trainData.Gender.fillna(trainData.Gender.dropna().max(),inplace =True)
trainData.Gender.fillna(trainData.Married.dropna().max(),inplace =True)