python实战计划第3周：给类目发帖量的柱状图

看过实例后做起来比较容易

我的成果

Paste_Image.png

我的代码

cates_list=[]
for i in item_infos.find():
    cates_list.append(i['cates'][2])
cates_index=list(set(cates_list))
print(cates_index)

cate_times=[]
for index in cates_index:
    cate_times.append(cates_list.count(index))
print(cate_times)

def cate_posts(types):
    length=0
    if length <= len(cates_index):
        for cate,times in zip(cates_index,cate_times):
            data={
                'name':cate,
                'data':[times],
                'type':types
            }
            yield data
            length+=1

series=[data for data in cate_posts('column')]
charts.plot(series,show='inline',options=dict(title=dict(text='北京各类目二手物品发帖量')))

总结

• 简单统计一下各个类目的发帖量