Pandas to_parquet overwrite

pandas to_parquet overwrite

The to_parquet method in pandas is used to write a DataFrame to the Parquet file format. By default, if the output file already exists, it will raise an error. However, the method provides an option to overwrite the existing file.

To overwrite an existing Parquet file, you can set the overwrite parameter to True. This will replace the contents of the file with the new DataFrame being written.

Example:

Suppose we have a DataFrame called df that we want to write to a Parquet file named output.parquet:

    
      import pandas as pd

      # Create the DataFrame
      df = pd.DataFrame({'A': [1, 2, 3],
                         'B': ['apple', 'banana', 'orange']})

      # Write the DataFrame to Parquet
      df.to_parquet('output.parquet', overwrite=True)
    
  

In the above example, the to_parquet method is called with overwrite=True. If the file output.parquet already exists, it will be overwritten with the contents of the df DataFrame.

This is useful when you want to update an existing Parquet file with a new DataFrame or replace its contents entirely.