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check value a valid item in enum.
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Here is a Python code to check value a valid item in an enum

import enum

def is_valid_enum_item(value):
    """Check value a valid item in enum"""
    return isinstance(value, enum.Enum)

# Enter the value
value = "a"

# Calling the function
if is_valid_enum_item(value):
    print("Valid")
else:
    print("Invalid")

#Example Output
# Invalid

#Remember to inspect code for bugs.