Python在任何嵌套级别进行解析并获得最高的属性值

问题描述

我已经完成了一项任务，并且一直试图解决这个问题已经无济于事了。纸质记录可以嵌套在字典的任何级别

我正在尝试解析yaml文件并获取输出所在的嵌套值

children

到目前为止，我只能从代码中获得键和值对，但是我去了任何地方。任何人都可以留下想法

这是YAML文件的输出

sales                      highest_sales
sales.yml/sales1/paper1       Dwight

{'sales1': {'paper1': {'Jim': 8,'Pam': 9,'Dwight': 43}},'sales2': {'morning_sales': {'paper2': {'Jim': 10,'Pam': 23,'Dwight': 67,'Michael': 12}},'evening_sales': {'paper3': {'Jim': 3,'Pam': 43,'Dwight': 67}}},'paper4': {'Jim': 23,'Pam': 14,'Dwight': 8}}

解决方法

可以使用operator.itemgetter Documentation找到最大值的键
您可以尝试使用此代码，它应该可以工作

import yaml
import operator

def check_max(k,v,prev_key):
    try:
        # To get key of maximum sale
        sales = max(v.items(),key=operator.itemgetter(1))[0]
        if 'sales' in sales or 'paper' in sales:
            # To check if value is another dictionary
            raise Exception("value is a dictionary")
        print("{:38s} {:10s}".format(str(prev_key)+'/'+str(k),sales))

    except:
        # The value was a dictionary 
        for k1,v1 in v.items():
            check_max(k1,v1,prev_key+'/'+str(k))


with open(r"C:\Users\Jason\Assignments\Assignment8\sales.yml",'r') as yamlfile:
        data = yaml.load(yamlfile,Loader=yaml.FullLoader)  

# Formatting of data you can 
# increase the value for proper formatting
print("{:38s} {:10s}".format("sales","highest_sales"))
for k,v in data.items():
    check_max(k,'sales.yml')

输出：

sales                                  highest_sales
sales.yml/sales1/paper1                Dwight
sales.yml/sales2/morning_sales/paper2  Dwight
sales.yml/sales2/evening_sales/paper3  Dwight
sales.yml/paper4                       Jim