how to add new column to dataframe

1#using the insert function:
2df.insert(location, column_name, list_of_values) 
3#example
4df.insert(0, 'new_column', ['a','b','c'])
5#explanation:
6#put "new_column" as first column of the dataframe
7#and puts 'a','b' and 'c' as values
8
9#using array-like access:
10df['new_column_name'] = value
11
12#df stands for dataframe

1# Import pandas package  
2import pandas as pd 
3  
4# Define a dictionary containing Students data 
5data = {'Name': ['Jai', 'Princi', 'Gaurav', 'Anuj'], 
6        'Height': [5.1, 6.2, 5.1, 5.2], 
7        'Qualification': ['Msc', 'MA', 'Msc', 'Msc']} 
8  
9# Convert the dictionary into DataFrame 
10df = pd.DataFrame(data) 
11  
12# Declare a list that is to be converted into a column 
13address = ['Delhi', 'Bangalore', 'Chennai', 'Patna'] 
14  
15# Using 'Address' as the column name 
16# and equating it to the list 
17df['Address'] = address 
18  
19# Observe the result 
20df