import json
#将数据加载到列表
filename='population_data.json'
with open(filename) as f:
	pop_data=json.load(f)
#打印每个国家2010人口数量
for pop_dict in pop_data:
	if pop_dict['Year']=='2010':
		country_name=pop_dict['Country Name']
		population=int(float(pop_dict['Value']))
		print(country_name+": "+str(population))