from machine import Pin
from utime import sleep

from machine import SDCard
import os

def f():
  sd = SDCard(slot=2)
  os.mount(sd, '/sd')
  os.mkdir('/sd/lib')
  os.chdir('/sd/lib')
  print(os.listdir())

  f = open('hello.py', 'w')
  f.write('print("hello!")')
  f.close()

  print(os.listdir())

  f = open('hello.py', 'r')
  print(f.read())
  f.close()

  import sys
  sys.path.append('/sd/lib')
  sys.path

  import hello

f()