While learning Flask and trying to run a machine learning model through a web app, I kept running into a “500 Internal Server Error.” This error was frustrating because it didn’t tell me exactly what was wrong.
After a lot of trial and error, I found a few common reasons why this happens. Here’s how I fixed it.
Press enter or click to view image in full size
What is a “500 Internal Server Error”?
A “500 Internal Server Error” means something went wrong on the server side, but it doesn’t tell you exactly what. To fix it, I had to do some detective work.
Common Causes and How I Fixed Them
Forgetting to Import a Library
One main reason for this error was forgetting to import all the libraries my code needed.
For example, when I was using a machine learning model, I forgot to import the sklearn library, which caused the error.
How I Fixed It: I double-checked that I had imported all the necessary libraries at the start of my script. If I wasn't sure which libraries were needed, I reviewed my model's code to see which ones it used.
2. Typing Mistakes in Requests
Another reason I faced this error was due to typos when sending requests. Sometimes, I would use the wrong route name, the wrong method (like POST instead of…
Transitioning to data science, holding degree in mechanical and MBA in marketing, open-minded & eager to acquire knowledge & embark on a journey in data science
