add a column to a CSV file in Python

umar zia answered on February 22, 2021 Popularity 9/10 Helpfulness 4/10

answer add a column to a CSV file in Python

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related add new column to an csv file and fill it then save the file

add a column to a CSV file in Python

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df = pd.read_csv("sample.csv")
df["new_column"] = "abc"
df.to_csv("sample.csv", index=False)

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Source: Grepper

Tags: add csv file python

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Contributed on Aug 15 2022

umar zia

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how to add new column in csv file using pandas

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import pandas as pd
csv_input = pd.read_csv('input.csv')
csv_input['Berries'] = csv_input['Name']
csv_input.to_csv('output.csv', index=False)

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Source: stackoverflow.com

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Contributed on Feb 22 2021

AMi

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add new column to an csv file and fill it then save the file

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import csv

# Define the function abc() - replace this with your own function implementation
def abc(value):
    return value * 2  # For example, doubling the input value

def add_new_column(input_file, output_file):
    # Read the CSV file and store its data in a list of dictionaries
    with open(input_file, 'r') as csvfile:
        reader = csv.DictReader(csvfile)
        data = list(reader)

    # Add a new column to the data and fill it with the result of abc() function
    for row in data:
        new_column_value = abc(int(row['SomeColumn']))  # Replace 'SomeColumn' with the name of the column you want to use as input
        row['NewColumn'] = new_column_value

    # Write the modified data back to the CSV file with the new column
    fieldnames = reader.fieldnames + ['NewColumn']
    with open(output_file, 'w', newline='') as csvfile:
        writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        writer.writeheader()
        writer.writerows(data)

if __name__ == "__main__":
    input_csv_file = "input.csv"  # Replace with the name of your input CSV file
    output_csv_file = "output.csv"  # Replace with the desired name of your output CSV file
    add_new_column(input_csv_file, output_csv_file)
    print("New column added and CSV file saved successfully!")

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Source: chat.openai.com

Tags: add csv file fill python save

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Contributed on Jul 20 2023

Hussain Abbas

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add a column to a CSV file in Python

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