# get all categorical columns in the dataframe
catCols = [col for col in df1.columns if df1[col].dtype=="O"]

from sklearn.preprocessing import LabelEncoder

lb_make = LabelEncoder()

for item in catCols:
    df1[item] = lb_make.fit_transform(df1[item])

sex = train_dataset['Sex'].replace(['female','male'],[0,1])
print(sex)

from sklearn.preprocessing import LabelEncoder

lb_make = LabelEncoder()
obj_df["make_code"] = lb_make.fit_transform(obj_df["make"])
obj_df[["make", "make_code"]].head(11)

from sklearn import preprocessing

lab_encoder = preprocessing.LabelEncoder()
df['column'] = lab_encoder.fit_transform(df['column'])

pd.get_dummies(obj_df, columns=["body_style", "drive_wheels"], prefix=["body", "drive"]).head()

obj_df["body_style"] = obj_df["body_style"].astype('category')
obj_df.dtypes