Sometimes you may have an column index and wanted to get column name by index in pandas DataFrmae, you can do so by using DataFrame.columns[idx]. Note that index start from 0.
Get Column Name by Index Example
DataFrame.columns returns an object of pandas.core.indexes.base.Index and use the position by using [] operator to get the column name by index or position.
Let’s see with an example by creating a DataFrame.
import pandas as pd
import numpy as np
technologies = {
'Courses':["Spark","PySpark","Python"],
'Fee' :[20000,25000,22000],
'Duration':['30days','40days','35days'],
'Discount':[1000,2300,1200]
}
df = pd.DataFrame(technologies)
print(df)
Now let’s get the column names from pandas DataFrame, As I said the below example returns an Index object containing all column names.
print(df.columns)
# Outputs
Index(['Courses', 'Fee', 'Duration', 'Discount'], dtype='object')
to get column name by column index use t
print(df.columns[2])
# Outputs
Duration
