如何将 Node.js 转换为 python

Question

大家好，我想将这个 node.js 代码的 sn-p 转换为 python，我在 python 方面不是特别强。对于一个小的背景故事，我正在执行一个 api get 请求来提取数据，我特别想提取一个表中的所有内容（字段和值）。到目前为止，从 node.js sn-p 我了解到我正在使用 for 循环读取一个 txt 文件以遍历索引中一个表中的所有字段，但我不知道如何在我的 python 代码中实现这一点.有什么可以帮助的建议吗？

这是一个tables.txt文件

{"Tables":
    [
        {
            "Name": "Event",
            "EventType": "CSummary",
            "Fields": "*",
            "SortBy": "WhenOccurred",
            "SortType": "Date",
            "Last": "01/14/2020 16:02:00 -05:00"
        }
    ]
}

这是我到目前为止所做的，但我不知道如何前进

scriptfile = open('tables.txt','r+')
r = requests.get(url, headers=headers, json={"script": " this is a work in progress"}, verify=verify)
resources = json.dumps(scriptfile)
for table in range(len(resources):

这是我要转换的node.js sn-p。

function GetSecrets(authToken, authCookie, next) {

            let resources = JSON.parse(fs.readFileSync('tables.txt').toString());

            console.log("Tables to get: " + resources.Tables.length);

            // Loop through all the tables to get
            for (let i = 0; i < resources.Tables.length; i++) {
                let thisResource = resources.Tables[i];
                let tableName = thisResource.Name;
                let sortBy = thisResource.SortBy;
                let lastGot = thisResource.Last;
                let fields = thisResource.Fields;
                let sortType = thisResource.SortType;
                let eventType = thisResource.EventType;
                let fileName = '';

                let sql = '';

                if (tableName === 'Event') {
                    sql = "SELECT " + fields + " FROM " + tableName + " WHERE Event.EventType IN ('" + eventType + "') AND " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ";"

                    fileName = "Event-" + eventType;
                } else {
                    if (sortType === 'None') {
                        sql = "SELECT " + fields + " FROM " + tableName + ";";
                    } else {
                        sql = "SELECT " + fields + " FROM " + tableName + " WHERE " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ";"
                    }
                    fileName = tableName;
                }


            post_data = JSON.stringify({
                "Script": sql,
            });

Answer 1

这对你有用：

import json
def GetSecrets(resources):
    resources = json.load(open("tables.txt"))
    print(f"Tables to get: {len(resources)}")
    for resource in resources.values():    
        tableName = resource[0]["Name"]
        sortBy = resource[0]["SortBy"]
        lastGot = resource[0]["Last"]
        fields = resource[0]["Fields"]
        sortType = resource[0]["SortType"]
        eventType = resource[0]["EventType"]        
        if tableName == "Event":
            sql = "SELECT " + fields + " FROM " + tableName + " WHERE Event.EventType IN ('" + eventType + "') AND " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ""
            fileName = "Event-" + eventType
        elif sortType=="None":
            sql = "SELECT " + fields + " FROM " + tableName + ""
        else:
            sql = "SELECT " + fields + " FROM " + tableName + " WHERE " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ""
            fileName = tableName
    return f"Script: {sql}"

Answer 2

这个问题不适合 Stack Overflow。您的代码没有具体问题。

您可以学习here 如何在 Python 中迭代数组。

如果您的resources 是一个“复杂”对象，那么您可能想了解dictionaries。

Answer 3

我不知道这样的问题在这里是否可以接受。

希望对你有帮助。

import json

with open('tables.txt') as json_file:
    data = json.load(json_file)
    for p in data['Tables']:
        tableName = p['Name']
        sortBy = p['SortBy']
        lastGot = p['Last']
        fields = p['Fields']
        sortType = p['SortType']
        eventType = p['EventType']
        fileName = ""
        sql = ""

        if (tableName == 'Event'):
            sql = "SELECT " + fields + " FROM " + tableName + " WHERE Event.EventType IN ('" + eventType + "') AND " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ";"

            fileName = "Event-" + eventType
        else:
            if (sortType == 'None'):
                sql = "SELECT " + fields + " FROM " + tableName + ";";
            else:
                sql = "SELECT " + fields + " FROM " + tableName + " WHERE " + tableName + "." + sortBy + " > DateFunc('" + lastGot + "') ORDER BY " + tableName + "." + sortBy + ";"

            fileName = tableName

print(sql)