Desktop APPS with Flask an PyWebview

Here is a recipe on how to accomplish this :

Create a folder sructure like this one :

In the app.py file :

from flask import Flask, render_template
import webview
import sys
import os

base_dir = '.'
if hasattr(sys, '_MEIPASS'):
    base_dir = sys._MEIPASS

def resource_path(relative_path):
    """ Get absolute path to resource, works for dev and for PyInstaller """
    try:
        # PyInstaller creates a temp folder and stores path in _MEIPASS
        base_path = sys._MEIPASS
    except Exception:
        base_path = os.path.abspath(".")

    return os.path.join(base_path, relative_path)

tf = resource_path('templates')
sf = resource_path('static')

app = Flask(__name__, static_folder=sf, template_folder=tf)

@app.route('/')
def home():
    return render_template("index.html")

if __name__ == '__main__':
    webview.create_window('My Flask App', app)
    webview.start()

In the main.spec file :

# -*- mode: python ; coding: utf-8 -*-


a = Analysis(
    ['main.py'],
    pathex=[],
    binaries=[],
    datas=[
        ('static', 'static'),
        ('templates', 'templates'),
    ],
    hiddenimports=[],
    hookspath=[],
    hooksconfig={},
    runtime_hooks=[],
    excludes=[],
    noarchive=False,
    optimize=0,
)
pyz = PYZ(a.pure)

exe = EXE(
    pyz,
    a.scripts,
    a.binaries,
    a.datas,
    [],
    name='main',
    debug=False,
    bootloader_ignore_signals=False,
    strip=False,
    upx=True,
    upx_exclude=[],
    runtime_tmpdir=None,
    console=False,
    disable_windowed_traceback=False,
    argv_emulation=False,
    target_arch=None,
    codesign_identity=None,
    entitlements_file=None,
)

And finally, run the following command:

pyinstaller main.spec

The exe is in the dist folder