| import pandas as pd | |
| provincial = pd.read_parquet("data/provincial_annual/provincial_annual.parquet") | |
| key_cities = pd.read_parquet("data/key_city_annual/key_city_annual.parquet") | |
| national = pd.read_parquet("data/national_structure/national_structure.parquet") | |
| print(provincial.head()) | |
| print(key_cities[key_cities["region_name"] == "成都市"].sort_values("stat_year")) | |
| print(national[national["metric_code"] == "resident_total_population"].sort_values("stat_year").tail()) | |