python编程从入门到实践第16章练习题.zip

import pygal.maps.world import json from country_codes import get_country_code from pygal.style import RotateStyle from pygal.style import LightColorizedStyle,RotateStyle filename='population_data.json' with open(filename) as f: pop_date=json.load(f) cc_populations={} for pop_dict in pop_date: if pop_dict['Year']=='2010': country=pop_dict['Country Name'] population=int(float(pop_dict['Value'])) code=get_country_code(country) if code: cc_populations[code]=population cc_pops_1,cc_pops_2,cc_pops_3={},{},{} for cc,pop,in cc_populations.items(): if pop<10000000: cc_pops_1[cc]=pop elif pop<1000000000: cc_pops_2[cc]=pop else: cc_pops_3[cc]=pop print(len(cc_pops_1), len(cc_pops_2), len(cc_pops_3)) #wm_style=RotateStyle('#336699') wm_style=LightColorizedStyle wm_style=RotateStyle('#336699',base_style=LightColorizedStyle) wm=pygal.maps.world.World(style=wm_style) wm.title='World Population in 2010, by Country' wm.add('0-10m',cc_pops_1) wm.add('10m-1bn',cc_pops_2) wm.add('>1bn',cc_pops_3) wm.render_to_file('world_population_2.svg')