Writing array to csv python (one column)

Writing an Array to CSV in Python (One Column)

This article demonstrates how to write a one-dimensional Python array to a CSV file using the csv module.

Setting Up the Environment

Ensure you have Python installed on your system. The csv module is part of the standard library, so no additional installation is required.

Writing the Array to CSV

The following Python code illustrates the process:

Explanation

• Import the csv module: This line imports the necessary functions for working with CSV files.
• Create a sample array: This line defines a one-dimensional array named my_array containing numbers.
• Specify the CSV file name: The csv_file_name variable holds the name of the CSV file to be created.
• Open the CSV file: The with open(...) statement opens the CSV file in write mode (‘w’) and ensures proper file closure, even if exceptions occur.
• Create a CSV writer object: The csv.writer(csv_file) creates a writer object to handle writing data to the CSV file.
• Write array elements to rows: The loop iterates through each element in the array and writes it to a separate row in the CSV file using the writerow() method.

Output

After running this code, you will find a CSV file named ‘my_data.csv’ in your working directory with the following content:

 1 2 3 4 5 

Conclusion

This simple example demonstrates how to write a one-dimensional Python array to a CSV file with each element on a separate row. You can easily adapt this code for arrays with different data types and for writing to other file formats using Python’s diverse data handling capabilities.