如何解决如何从 Python 字典中获取每个 URL？
我有一个代表菜单的 yaml 字符串。在我从中获得字典后，我尝试获取 URL 只是说 // Access the earlier property in this form anywhere
// Below is an example
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
Form1 f1 = new Form1();
label1.Text = f1.UserName;
}
}
的键 url 以及不是 Parameter 的其他元素的列表的每个第一个元素。
这是我试过的
Parameter由此，我只能对 import yaml
import jmespath
import pprint
setting = """
GeneralSetting:
- Description: General Setting
MenuSetting:
- Description: Menu Setting
- Setting:
- AutoMenu:
- Description: Register menu
- HelpText: This is for auto create menu
- Value:
- Sample:
- Parameter:
- icon: fa fa-birthday-cake
- Active: Y
- Sample: [Sample]
- Sample Account: [SampleAccount]
- Multi Journal:
- Parameter:
- icon: fas fa-book
- url: MultiJournal
- Foreign Exchange:
- Parameter:
- icon: fa fa-money-bill-alt
- url: ForeignExchange
- Loan Contract:
- Parameter:
- icon: fa fa-capsules
- Active: Y
- Loan Contract: [LoanContract,1]
- Loan Report:
- Loan Detail Listing: [LoanDetailListing,1]
- Loan Application Detail Listing: [ReportR003,1]
"""
toDict = yaml.load(setting,yaml.SafeLoader)
pp = pprint.PrettyPrinter(indent=2)
# ALL
ALL = jmespath.search('MenuSetting[].Setting[].AutoMenu[].Value[].*[]',toDict)
ParentURL = jmespath.search('MenuSetting[].Setting[].AutoMenu[].Value[].*[0][].Parameter[].url',toDict)
NotParameter = {key:value for item in ALL for it in item for key,value in it.items() if key != "Parameter"}
# pp.pprint(NotParameter)
# print ('-----')
SubURL = jmespath.search('*[0]',NotParameter)
SubSubURL = jmespath.search('*[].*[][]',NotParameter)
pp.pprint(ParentURL)
print('---')
pp.pprint(SubURL)
print('---')
pp.pprint(SubSubURL)
下的 url（例如 Parameter）的父 URL 做得很好，但不能对 child 和 sub-child 处理。
我只想要 url 的最终结果作为这个列表
[MultiJournal,ForeignExchange]
我尝试了几种方法，但仍然无法得到结果？
有什么办法可以得到这样的价值清单吗？谢谢
解决方法
虽然我坚信您的 YAML 结构不是您应该拥有的结构（更多的是更低），但这里将是一个与您的预期输出匹配的查询：
MenuSetting[].Setting[].AutoMenu[2].[Value[0].[Sample[].Sample,Sample[]."Sample Account"],Value[]."Multi Journal"[].Parameter[1].url,Value[]."Foreign Exchange"[].Parameter[1].url,Value[]."Loan Contract"[]."Loan Contract"[0],Value[]."Loan Contract"[]."Loan Report"[0]."Loan Detail Listing"[0],Value[]."Loan Contract"[]."Loan Report"[1]."Loan Application Detail Listing"[0]][][][][]
基于与您的 YAML 等效的 JSON：
{
"GeneralSetting": [
{
"Description": "General Setting"
}
],"MenuSetting": [
{
"Description": "Menu Setting"
},{
"Setting": [
{
"AutoMenu": [
{
"Description": "Register menu"
},{
"HelpText": "This is for auto create menu"
},{
"Value": [
{
"Sample": [
{
"Parameter": [
{
"icon": "fa fa-birthday-cake"
},{
"Active": "Y"
}
]
},{
"Sample": [
"Sample"
]
},{
"Sample Account": [
"SampleAccount"
]
}
]
},{
"Multi Journal": [
{
"Parameter": [
{
"icon": "fas fa-book"
},{
"url": "MultiJournal"
}
]
}
]
},{
"Foreign Exchange": [
{
"Parameter": [
{
"icon": "fa fa-money-bill-alt"
},{
"url": "ForeignExchange"
}
]
}
]
},{
"Loan Contract": [
{
"Parameter": [
{
"icon": "fa fa-capsules"
},{
"Loan Contract": [
"LoanContract",1
]
},{
"Loan Report": [
{
"Loan Detail Listing": [
"LoanDetailListing",1
]
},{
"Loan Application Detail Listing": [
"ReportR003",1
]
}
]
}
]
}
]
}
]
}
]
}
]
}
此查询给出：
[
"Sample","SampleAccount","MultiJournal","ForeignExchange","LoanContract","LoanDetailListing","ReportR003"
]
现在我相信您的 YAML 有很多问题，并且您在 YAML 中混淆了列表和字典。
列表以破折号开头：
- carrot
- onions
- potatoes
字典是一组键/值对，它们都代表父键的属性：
car:
brand: ferrari
model: 488
engine: "3.9 l twin-turbocharged"
当然，你可以有一个字典列表：
- name: duck
sound: quack
legs: 2
- name: cow
sound: moo
legs: 4
所以在你的 YAML 中，如果我专注于它的顶部，我相信它应该是这样的：
GeneralSetting:
Description: General Setting
MenuSetting:
Description: Menu Setting
Setting:
AutoMenu:
Description: Register menu
HelpText: This is for auto create menu
Value:
Sample:
Parameter:
icon: fa fa-birthday-cake
Active: Y
Sample: Sample
Sample Account: SampleAccount
Multi Journal:
Parameter:
icon: fas fa-book
url: MultiJournal
Foreign Exchange:
Parameter:
icon: fa fa-money-bill-alt
url: ForeignExchange
# ...
当然，这会完全改变和简化查询，例如，基于此 YAML，生成的 JSON 将是：
{
"GeneralSetting": {
"Description": "General Setting"
},"MenuSetting": {
"Description": "Menu Setting","Setting": {
"AutoMenu": {
"Description": "Register menu","HelpText": "This is for auto create menu","Value": {
"Sample": {
"Parameter": {
"icon": "fa fa-birthday-cake","Active": "Y"
},"Sample": "Sample","Sample Account": "SampleAccount"
},"Multi Journal": {
"Parameter": {
"icon": "fas fa-book","url": "MultiJournal"
}
},"Foreign Exchange": {
"Parameter": {
"icon": "fa fa-money-bill-alt","url": "ForeignExchange"
}
}
}
}
}
}
}
对第一个元素的查询将是：
MenuSetting.Setting.AutoMenu.Value.[Sample.Sample,Sample."Sample Account",*.Parameter.url][]
这将给出预期：
[
"Sample","ForeignExchange"
]
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