Avoid_KeyError.py

# If the key is not in the dictionary, .get() will return 'N/A'.
dict1.get('key1', 'N/A')

for key in dict1:
    print(key, [dict1.get('subkey1', 'N/A') for item in dict1[key]])  
# The structure of dict1
# {'key1': [{'subkey1': 'Blue','subkey2': None}, {'subkey1': 'Gray', 'subkey2': 'Perfect'}],
#  'key2': [{'subkey1': 'Red','subkey2': 'Great'}, {'subkey1': 'Green', 'subkey2': '...'}]}