[Question] I'm encountering a ModuleNotFoundError "wsgiref" when running my Flet app after building:

[fukaminmin]

Question

Error Title

ModuleNotFoundError: No module named 'wsgiref'

Environment

• OS: macOS Sonoma 14.5
• Flet version: 0.25.2
• Python version: 3.12.5

Steps to Reproduce

1. Building the Flet app using flet build macos --project myAppName --copyright myName --build-version 0.1.0
2. Running the built application
3. Error appears immediately on startup

Expected Behavior

The application should start normally without any module import errors.

Additional Context

• Using pygsheets for Google Sheets integration
• The application works fine in development mode
• The error only occurs in the built/packaged version

Questions

1. Is this a known issue with packaging Flet applications that use Google OAuth?
2. How can I ensure the wsgiref module is properly included in the built package?
3. Are there any workarounds or alternative approaches?

Code sample

from google.oauth2.credentials import Credentials
from google.oauth2 import service_account
from google.auth.transport.requests import Request
import pygsheets

Write Some Codes

Error message

Traceback (most recent call last):
  File "<string>", line 47, in <module>
  File "<frozen runpy>", line 229, in run_module
  File "<frozen runpy>", line 88, in _run_code
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/main.py", line 4, in <module>
    from screen_settings import SettingsScreen
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/screen_settings.py", line 6, in <module>
    from service_config_checker import ServiceConfigChecker
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/service_config_checker.py", line 3, in <module>
    from service_sheet import ServiceSheet
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/service_sheet.py", line 4, in <module>
    import pygsheets
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/__pypackages__/pygsheets/__init__.py", line 14, in <module>
    from pygsheets.authorization import authorize
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/__pypackages__/pygsheets/authorization.py", line 8, in <module>
    from google_auth_oauthlib.flow import Flow, InstalledAppFlow
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/__pypackages__/google_auth_oauthlib/__init__.py", line 21, in <module>
    from .interactive import get_user_credentials
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/__pypackages__/google_auth_oauthlib/interactive.py", line 27, in <module>
    import google_auth_oauthlib.flow
  File "/Users/myAccount/Library/Application Support/com.mycompany.myAppName/flet/app/__pypackages__/google_auth_oauthlib/flow.py", line 62, in <module>
    import wsgiref.simple_server
ModuleNotFoundError: No module named 'wsgiref'

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• I have searched for answers to my question both in the issues and in previous discussions.