<human>:  check valid dictionary key.
<bot>: Here is a Python program to check valid dictionary key

import json

def _check_valid_key(key):
  """
  Checks if the key is a valid dictionary key.
  """
  if not isinstance(key, str):
    raise TypeError("Invalid type for key. Expected str, found %s" % type(key))
  if not key:
    raise ValueError("Invalid value for key.")

# Enter the key
key = "key"

# Calling the function
if _check_valid_key(key):
  print("Key is valid")
else:
  print("Key is invalid")

#Example Output
# Key is invalid

#Remember to inspect code for bugs.