world_map

pygal-2.4
pygal-maps-world-1.0.2 世界地图模块位置变更

pygal内置世界地图模块，包括国别码模块COUNTRIES以及世界地图模块World。

当前版本下，绘制世界地图，需要从pygal_maps_world.i18n中引国别码，需要从pygal_maps_world.maps中引世界地图。

参考代码如下：

countries.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from pygal_maps_world.i18n import COUNTRIES

def get_country_code(country_name):
    """根据指定国家，返回国别码"""
    for code, name in COUNTRIES.items():
        if name == country_name or name == country_name.title():
            return code
    return None

population_data.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from settings import Settings
from countries import get_country_code
from pygal.style import RotateStyle as RS,LightColorizedStyle as LCS
import pygal_maps_world.maps
import json


data_setting = Settings()
filename = data_setting.json_population

with open(filename) as f_obj:
    pop_data = json.load(f_obj)

#打印每个国家2010年的人口
cc_population = {}
for pop_dict in pop_data:
    if pop_dict['Year'] == '2010':
        country_name = pop_dict['Country Name']
        population = int(float(pop_dict['Value']))
        code = get_country_code(country_name)
        if code:
            cc_population[code] = population
#按人口给国家分组
cc_pops_1, cc_pops_2, cc_pops_3 = {}, {}, {}
for cc, pop in cc_population.items():
    if pop < 10000000:
        cc_pops_1[cc] = pop
    elif pop < 1000000000:
        cc_pops_2[cc] = pop
    else:
        cc_pops_3[cc] = pop

wm_style = RS('#336699',base_style=LCS)
wm = pygal_maps_world.maps.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.svg')