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Python

Python can turn a CSV file of saved records into a report. It can also run the server part of a web app when you deploy it with the right setup.

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Can you use Python without adding another web service?

Yes. A local script can read an exported CSV and count the bookings for each day. A CSV is a plain text table that you can often open in a spreadsheet. Python includes tools to read and write it.

  1. Make a separate sample file
    Write two fictional Tuesday bookings and one Wednesday booking. Leave customer exports and live connections out of the test.
  2. Describe the result you expect
    Ask for a count of 2 on Tuesday and 1 on Wednesday. Keep the result in a separate file so the script never needs to overwrite the input.
  3. Try a row with no date
    Agree whether the row should be set aside or stop the report. Check that the script tells you what happened instead of silently counting it.

When does Python need somewhere to run after you launch?

A one-off report can run on your computer. A scheduled report needs a machine or service to run the job at the agreed time. A Python app answering live web requests needs a production server setup.

A framework such as Django documents what to configure for deployment. A development preview alone does not establish that the host will handle live traffic, protect private settings or keep records across restarts.

There are specialized ways to run Python in a browser, including environments built with Emscripten. They require a different setup from serving the usual browser JavaScript files or hosting a Python web service.

Which Python and package versions should you record?

Record the Python version that runs the job and how the project installs its packages. A virtual environment is a separate place for one project’s installed packages. Keep the instructions to recreate it.

The CPython support table lists 3.15 and 3.14 in bugfix support, 3.13 through 3.11 in security support, and 3.10 as end-of-life. Use a supported line that your needed packages and host support. A newly released line may need a different package version.

What costs or data are outside the Python install?

Python is open source. A hosted service, scheduler or database may charge separately. A local script can work on fake files without a hosting account.

Keep the script, dependency inputs, configuration instructions and a sample file with a known result. Keep production inputs and outputs in their own storage. A fresh install gives you the program again, but it does not recover a report or its source data.