<human>:  Can you show me a Python function to default value if null.
<bot>: Here is a Python function to default value if null

import numpy as np

def __default_value():
  """
  >>> __default_value()
  'default'
  """
  return 'default'

# Enter the default value
default_value = 'default'

# Calling the function
print((__default_value()))

#Example Output
# default

#Remember to inspect code for bugs.