2019-01-11

按照书籍中

代码
americas.py

import pygal

wm = pygal.Worldmap()

wm.title = 'North,Central,and South America'#设置该地图的title属性

wm.add('North America',['ca','mx','us'])#使用ADD党阀接收一个标签和一个列表

wm.add('Central America',['bz','cr','gt','hn','ni','pa','sv'])

wm.add('South America',['ar','bo','br','cl','co','ec','gf'])

wm.render_to_file('americas.svg')

输出结果为

AttributeError: module 'pygal' has no attribute 'Worldmap'

因为老旧模块已经不存在
修改为
americas.py

import pygal.maps.world
wm = pygal.maps.world.World()#创建一个worldmap的势力
wm.title = 'North,Central,and South America'#设置该地图的title属性

wm.add('North America',['ca','mx','us'])#使用ADD党阀接收一个标签和一个列表

wm.add('Central America',['bz','cr','gt','hn','ni','pa','sv'])

wm.add('South America',['ar','bo','br','cl','co','ec','gf'])

wm.render_to_file('americas.svg')

文件会生成一个americas.svg文件，使用浏览器打开即可访问。

程序
na_populations

import pygal
wm = pygal.Worldmap()
wm.title = 'Population of Countries in North America'
wm.add('North America',{'ca':34126000,'us':30934900,'mx':113423000})
wm.render_to_file('na_populations.svg')

报错

AttributeError: module 'pygal' has no attribute 'Worldmap'

改为

import pygal.maps.world
wm = pygal.maps.world.World()
wm.title = 'Population of Countries in North America'
wm.add('North America',{'ca':34126000,'us':30934900,'mx':113423000})
wm.render_to_file('na_populations.svg')