students = [ ('Raj', 24, 'Mumbai', 95) , How to Add a Column to a DataFrame in Python Pandas In order to group by multiple columns you need to use the next syntax: df.groupby(['publication', 'date_m']) Copy. When we're doing data analysis with Python, we might sometimes want to add a column to a pandas DataFrame based on the values in other columns of the DataFrame. 2. How To Add Header To Pandas Dataframe? - Stack Vidhya Using Numpy Select to Set Values using Multiple Conditions. Adding multiple columns is quite simple. Example Code: Method 1: Add Multiple Columns that Each Contain One Value. Equivalent to dataframe + other, but with support to substitute a fill_value for missing data in one of the inputs. The benefit of this approach is that we can assign a new column that stores these values. reindex may be preferable where performance is critical.. How to add multiple columns to a dataframe with pandas Insert ( Position, & # x27 ; s create a DataFrame with a dictionary which Employee. In addition, this satisfies your requirement of df.empty evaluating to True if no data exists. # Add an empty columns using the assign () method df2 = df. astype (str) + df[' column2 '] And you can use the following syntax to combine multiple text columns into one: How to Add Empty Columns to Dataframe with Pandas Pandas also offer a feature to add one or multiple empty columns to the dataframe (table). # Creating simple dataframe # List . I have disabled Ad Blocker, Reload No Thanks! assign (half_pts= lambda x: x. points / 2) #view DataFrame df points assists rebounds half_pts 0 25 5 11 12.5 1 12 7 8 6.0 2 15 7 . 2. new_column is the column name.