Answers for "dataframe in column true take column name"

get columns based on dtype pandas

>>df.select_dtypes(include='object').columns

Index(['C', 'D'], dtype='object')

python select columns names from dataframe

# Import pandas package  
import pandas as pd  
    
# making data frame  
data = pd.read_csv("nba.csv")  
  
# iterating the columns 
for col in data.columns: 
    print(col)