<human>:  how to convertt none type to string in.
<bot>: Here is a Python function to convert none type to string

import sys

def none_to_string(none):
  """
  Converts None to string.
  """
  return str(none)

# Enter the none
none = None

# Calling the function
print((none_to_string(none)))

#Example Output
# None

#Remember to inspect code for bugs.