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How to assign a new column in a Pandas DataFrame?
How to assign a new column in a Pandas DataFrame?
This recipe helps you assign a new column in a Pandas DataFrame
Recipe Objective
Have you tried to add new column in pandas dataframe?
So this is the recipe on how we can assign a new column in a Pandas DataFrame.
Step 1 - Importing Library
import pandas as pd
We have only imported pandas which is needed.
Step 2 - Creating DataFrame
We have created a empty dataframe and added columns to it.
df = pd.DataFrame()
df["StudentName"] = ["John", "Steve", "Sarah"]
print(df)
Step 3 - Adding a column
We have added a column with values of marks assigned in the function.
df = df.assign(Marks = [71, 82, 89])
print(df)
So the output comes as
StudentName 0 John 1 Steve 2 Sarah StudentName Marks 0 John 71 1 Steve 82 2 Sarah 89
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