Python using pandas to convert xlsx to csv file. How to delete index column?

Python using pandas to convert xlsx to csv file. How to delete index column?

When you convert an Excel (xlsx) file to a CSV file using pandas, the resulting CSV file will often contain the index column from the DataFrame. If you want to exclude the index column from the CSV file, you can use the index parameter of the to_csv() function.

Here's how you can do it:

import pandas as pd

# Read the Excel file into a DataFrame
excel_file = 'input.xlsx'
df = pd.read_excel(excel_file)

# Convert the DataFrame to CSV without including the index column
csv_file = 'output.csv'
df.to_csv(csv_file, index=False)  # Set index=False to exclude the index column

In the code above, the index=False parameter passed to the to_csv() function ensures that the index column is not included in the resulting CSV file.

If you want to include the index column but don't want to write it as a separate column, you can use the index_label parameter to set a label for the index column:

df.to_csv(csv_file, index_label='index')  # Write the index column with a label

In this case, the index will be included in the CSV file, but it will have the label "index" as the column header.

Choose the approach that best suits your needs: excluding the index column entirely or including it with a custom label.

Examples

  1. How to read an XLSX file in pandas?

    • Description: This code snippet demonstrates how to read an Excel file (.xlsx) into a pandas DataFrame.
    import pandas as pd
df = pd.read_excel('input.xlsx')

  2. How to convert an XLSX file to CSV with pandas?

    • Description: This example shows how to convert a DataFrame read from an Excel file into a CSV file.
    import pandas as pd
df = pd.read_excel('input.xlsx')
df.to_csv('output.csv', index=False)  # Saving without index

  3. How to delete the index column when converting XLSX to CSV?

    • Description: This code snippet demonstrates how to remove the index when converting an Excel file to CSV.
    import pandas as pd
df = pd.read_excel('input.xlsx')
df.to_csv('output.csv', index=False)  # Disables the index in CSV

  4. How to load a specific sheet from an Excel file with pandas?

    • Description: This example shows how to read a specific sheet from an Excel workbook.
    import pandas as pd
df = pd.read_excel('input.xlsx', sheet_name='Sheet2')  # Specify the sheet name

  5. How to export a DataFrame to CSV without headers using pandas?

    • Description: This snippet demonstrates how to convert a DataFrame to CSV without including the column headers.
    import pandas as pd
df = pd.read_excel('input.xlsx')
df.to_csv('output.csv', index=False, header=False)  # No headers

  6. How to handle large Excel files with pandas?

    • Description: This code snippet shows how to use chunks to process large Excel files without overwhelming memory.
    import pandas as pd
chunk_size = 1000  # Process 1000 rows at a time
for chunk in pd.read_excel('input.xlsx', chunksize=chunk_size):
    chunk.to_csv('output.csv', mode='a', header=not chunk._currow, index=False)

  7. How to append data to an existing CSV file with pandas?

    • Description: This example demonstrates how to append data to an existing CSV file.
    import pandas as pd
df = pd.read_excel('input.xlsx')
df.to_csv('output.csv', mode='a', index=False, header=False)  # Append to an existing CSV

  8. How to convert specific columns from XLSX to CSV using pandas?

    • Description: This code snippet shows how to select specific columns when converting from XLSX to CSV.
    import pandas as pd
df = pd.read_excel('input.xlsx', usecols=['Column1', 'Column3'])  # Select specific columns
df.to_csv('output.csv', index=False)  # Convert to CSV

  9. How to convert XLSX to CSV with a specific delimiter in pandas?

    • Description: This example demonstrates how to use a specific delimiter (such as a semicolon) when converting an Excel file to CSV.
    import pandas as pd
df = pd.read_excel('input.xlsx')
df.to_csv('output.csv', index=False, sep=';')  # Using a semicolon as a delimiter

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