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joplin notion extension/Web Development/Python/Flet/Intro.md

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+Intro
+https://flet.dev/docs/
+Flutter in python
+
+- Installation
+  `pip install flet` (Need python version>3.8)
+- Running code
+ `python counter.py`
+- Sample code
+```py
+import flet as ft
+
+def main(page: ft.Page):
+    page.title = "Flet counter example"
+    page.vertical_alignment = ft.MainAxisAlignment.CENTER
+
+    txt_number = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)
+
+    def minus_click(e):
+        txt_number.value = str(int(txt_number.value) - 1)
+        page.update()
+
+    def plus_click(e):
+        txt_number.value = str(int(txt_number.value) + 1)
+        page.update()
+
+    page.add(
+        ft.Row(
+            [
+                ft.IconButton(ft.icons.REMOVE, on_click=minus_click),
+                txt_number,
+                ft.IconButton(ft.icons.ADD, on_click=plus_click),
+            ],
+            alignment=ft.MainAxisAlignment.CENTER,
+        )
+    )
+
+ft.app(target=main)
+```
+- Packing
+  Need to install pyinstaller first using `pip install pyinstaller`
+  then
+  `flet pack counter.py`