Pandas DataFrame insert() Method

Example

Insert a new column with age of each member, and place it between "name" and "qualified":

import pandas as pd

data = {
"name": ["Sally", "Mary", "John"],
"qualified": [True, False, False]
}

df = pd.DataFrame(data)

df.insert(1, "age", [50, 40, 30])

print(df)

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Definition and Usage

The insert() method allows us to insert a new column to an existing DataFrame.

Syntax

dataframe.insert(loc, column, value, allow_duplicates)

Parameters

Parameter	Description
loc	Required. An integer specifying the location of the new column.
columns	Required. A string specifying the name of the new column.
value	Required. An array-like object specifying the values of the new column.
allow_duplicates	Optional. Default False, specifying whether the DataFrame allows columns with the same name or not.

Return Value

None. The insertion is done in the original DataFrame.

❮ DataFrame Reference