ijson

import ijson
import os
from io import BytesIO

# Example JSON data (simulating a file-like object)
json_data = b'{"earth": {"europe": [{"name": "Paris", "type": "city"}, {"name": "Rome", "type": "city"}]}, "america": [{"name": "New York", "type": "city"}]}'

# For demonstration, you might use BytesIO or a real file opened in binary mode
with BytesIO(json_data) as f:
    # Using the 'items' function to extract objects under a specific path
    # 'earth.europe.item' means: 'earth' object, then 'europe' array, then each 'item' in the array
    print("European cities:")
    for city in ijson.items(f, 'earth.europe.item'):
        print(city)

# Reset stream for another parse, or open a new file
with BytesIO(json_data) as f:
    print("\nAll cities:")
    # Using 'item' for a top-level array or '.item' for nested array items without specific object keys
    # Or a more general path if structure is less strict
    for city_or_state in ijson.items(f, 'earth..item'): # Matches any item within 'earth' object (e.g., europe.item, america.item)
        if isinstance(city_or_state, dict) and city_or_state.get('type') == 'city':
            print(city_or_state)

# Example with explicit backend selection (recommended for production)
# Ensure 'ijson[yajl2_cffi]' is installed for this to be effective
try:
    import ijson.backends.yajl2_cffi as ijson_fast
    with BytesIO(json_data) as f:
        print("\nEuropean cities (with yajl2_cffi backend):")
        for city in ijson_fast.items(f, 'earth.europe.item'):
            print(city)
except ImportError:
    print("\n'yajl2_cffi' backend not available. Install with 'pip install ijson[yajl2_cffi]'.")