unable to flash micropython to esp 32: open serial error

[vikram20]

Hi
Can anybody help me on the below ?
working on ESP8266 with Micropython and flashing was perfect.
Managed to install import esptool but its not working as I tried to 'import machine' error says
'no module named found'. 'import network'doesnot shows error but shows WLAN is not defined.
I tried 'pip install micropython-machine also but shows some error.
Plz support me on the same.

Error:
> import network
>>> import machine
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'machine'