module asyncio enabled but ImportError: no module named 'asyncio'

[bhcuong2008]

Hi,

I have a custom build MicroPython 1.21 on ESP32 with asyncio module enabled shown with help('modules')

>>> help('modules')
__main__          asyncio/stream    heapq             re
_asyncio          binascii          io                select
_cinit            builtins          json              struct
_thread           chive             lv_colors         sys
array             cmath             lv_utils          time
asyncio/__init__  collections       lvgl              uasyncio
asyncio/core      cwifi             math              uctypes
asyncio/event     device            micropython       ulab
asyncio/funcs     errno             os
asyncio/lock      gc                random
Plus any modules on the filesystem

But when importing module asyncio, it prompts:

>>> import asyncio
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: no module named 'asyncio'

I google, but not found any issue like me. Please guide me to troubleshoot it.
Thanks.

[Josverl]

What is returned by import sys;print (sys.path)

[bhcuong2008]

@Josverl , it is:

>>> print(sys.path)
['', '/lib']

[robert-hh]

The sys.path must include .frozen to get access to frozen bytecode. So it must be something like ['', '.frozen', '/lib'] , which is the default for ESP32.

[bhcuong2008]

Thank you so much. I upgrade my custom build from 1.16 to 1.21, so my initializing code clears sys path. Now it run smoothly.