使用auto-py-to-exe打包Flet计数器应用为EXE时遇错求助

问题重现 #

使用Flet编写的计数器应用代码如下：

import sys
sys.setrecursionlimit(sys.getrecursionlimit() * 5)
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(main)

使用auto-py-to-exe或flet pack打包时出现如下错误：

An error occurred while packaging
Traceback (most recent call last):
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\isolated\_parent.py", line 372, in call
    return isolated.call(function, *args, **kwargs)
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\isolated\_parent.py", line 293, in call
    ok, output = loads(b64decode(self._read_handle.readline()))
EOFError: EOF read where object expected

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\auto_py_to_exe\packaging.py", line 131, in package
    run_pyinstaller()
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\__main__.py", line 180, in run
    run_build(pyi_config, spec_file, **vars(args))
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\__main__.py", line 61, in run_build
    PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs)
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\building\build_main.py", line 1006, in main
    build(specfile, distpath, workpath, clean_build)
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\building\build_main.py", line 928, in build
    exec(code, spec_namespace)
  File "C:\Users\Lenovo\AppData\Local\Temp\tmprfg02jem\main.spec", line 7, in <module>
    a = Analysis(
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\building\build_main.py", line 428, in __init__
    self.__postinit__()
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\building\datastruct.py", line 184, in __postinit__
    self.assemble()
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\building\build_main.py", line 736, in assemble
    isolated.call(find_binary_dependencies, self.binaries, self.binding_redirects, collected_packages)
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\isolated\_parent.py", line 372, in call
    return isolated.call(function, *args, **kwargs)
  File "C:\Users\Lenovo\anaconda3\lib\site-packages\PyInstaller\isolated\_parent.py", line 247, in __exit__
    self._write_handle.flush()
OSError: [Errno 22] Invalid argument

Project output will not be moved to output folder
Complete.

解决方案 #

1. 升级核心依赖包 #

这类错误多数是版本兼容问题，先把相关工具包升级到最新版：

pip install --upgrade pyinstaller auto-py-to-exe flet

2. 调整Flet启动参数 #

修改代码中ft.app(main)的调用方式，指定视图模式或端口，避免默认webview的打包冲突：

# 可选方案1：指定桌面视图
ft.app(main, view=ft.AppView.FLET_APP)
# 可选方案2：指定浏览器视图并设置端口
ft.app(main, view=ft.AppView.WEB_BROWSER, port=8550)

3. 禁用PyInstaller隔离模式 #

• 如果用auto-py-to-exe：在高级选项中勾选Disable PyInstaller Isolated Mode
• 如果用命令行PyInstaller：添加--no-isolated参数

pyinstaller --onefile --windowed main.py --no-isolated

4. 用干净的虚拟环境打包 #

Anaconda环境可能有冗余依赖干扰，创建纯净虚拟环境重新打包：

# 用venv创建虚拟环境
python -m venv flet_pack_env
# 激活环境（Windows）
flet_pack_env\Scripts\activate
# 安装必要依赖
pip install flet pyinstaller
# 打包
pyinstaller --onefile main.py

5. 手动修改spec文件（终极方案） #

如果以上方法无效，手动生成并修改spec文件：

1. 生成初始spec文件：

pyinstaller main.py

2. 打开生成的main.spec，在Analysis部分添加exclude_binaries=True：

a = Analysis(
    ['main.py'],
    pathex=[],
    binaries=[],
    datas=[],
    hiddenimports=[],
    hookspath=[],
    hooksconfig={},
    runtime_hooks=[],
    excludes=[],
    win_no_prefer_redirects=False,
    win_private_assemblies=False,
    cipher=None,
    noarchive=False,
    exclude_binaries=True  # 添加这一行
)

3. 用修改后的spec文件打包：

pyinstaller main.spec

内容的提问来源于stack exchange，提问作者emrec