Zip copy missing keys

zip_copy_missing_keys.py

def copy_missing_keys(source_dict, destination_dict):
    for key, value in source_dict.items():
        if key not in destination_dict:
            destination_dict[key] = value

# Sample dictionaries
dict1 = {'key1': 42, 'key2': 10, 'key3': 5}
dict2 = {'key2': 15, 'key4': 23}

# Copy missing keys and values from dict1 to dict2
copy_missing_keys(dict1, dict2)

print(dict2)

# Output 

{'key2': 15, 'key4': 23, 'key1': 42, 'key3': 5}