main.py

pip install fastapi uvicorn

import os.path

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse

app = FastAPI()

static_file_abspath = os.path.join(os.path.dirname(__file__), "static")

app.mount("/static", StaticFiles(directory=static_file_abspath), name="static")


@app.get("/")
def index():
    return FileResponse(f"{static_file_abspath}/index.html")


if __name__ == '__main__':
    import uvicorn
    uvicorn.run(app)

client.py

# client.py
import random
import socket
import threading

import webview
from main import app
import uvicorn


def get_unused_port():
    """获取未被使用的端口"""
    while True:
        port = random.randint(1024, 65535)  # 端口范围一般为1024-65535
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        try:
            sock.bind(("localhost", port))
            sock.close()
            return port
        except OSError:
            pass


port = get_unused_port()

# 启动FastAPI服务
t = threading.Thread(target=uvicorn.run, args=(app,), kwargs={"port": port})
t.daemon = True
t.start()

# 在PyWebview应用程序中加载FastAPI应用程序的URL
webview.create_window('FastAPI Desktop', f'http://localhost:{port}')
webview.start()

build.py

from PyInstaller import __main__ as pyi

params = [
    '-F',
    # static目录纳入打包
    '--add-data', 'static:static',
    # 每次打包前清楚build 和 dist目录
    '--clean',
    # 无需用户确认
    '--noconfirm',
    'client.py'
]
# pyinstaller -F main.py
pyi.run(params)

备注

1. python的exe的命令行窗口当然可以通过 -w取消掉的，加入params就可以了，调试的时候命令行需要看，所以开着方便调试。
2. static 就是html的目录，vue生成的文件就放到这个目录中