How to transform entire pandas data frame in one hot representation?
You can use:: pandas.get_dummies

get_dummies will only convert string columns and will keep numerical columns as it is. You can first convert categorical columns into string type and then apply get_dummies.

concated_dataset['1stFlrSF'] = concated_dataset['1stFlrSF'].astype("string")
pd.get_dummies(cacated_dataset)