Installation issue

[Rsearch1234]

Getting this error when trying to run the script
python3 extanalysis.py
Traceback (most recent call last):
File "/home/ubuntu/Desktop/ExtAnalyser/ExtAnalysis/extanalysis.py", line 27, in
from flask import Flask, request, render_template, redirect, url_for, send_from_directory
ModuleNotFoundError: No module named 'flask'

[Tuhinshubhra]

you need to install the requirements through pip first.