Dictionary To Json Online

Looks like: MSH|^~\&. The syntax is designed to easily integrate into deployed systems that already use JSON, and provides a smooth upgrade path from JSON to JSON-LD. Writing a JSON file. Please help me with it. Hi Daniel, I also struggled with getting the request right. A protip by hartleybrody about python and json. This sample creates a custom T:Newtonsoft. json contains all the words from words_alpha. py for example usage. JSON to Python Reading JSON means converting JSON into a Python value (object). naming and design rules A set of rules governing the expression of information bundles using , and the creation of either or both the associated XML document model validation artefacts using and [], or/and JSON schema model artefacts using. The reason being that the JSON files are less cluttered and easy-to-read. The Linked Data Service provides access to commonly found standards and vocabularies promulgated by the Library of Congress. For example: [Serializable] public class MyClass { public int level; public float timeElapsed; public string playerName; }. How to parse JSON data in Nintex Workflow for Office 365 - Kloud Blog A workflow is usually described as a series of tasks that produce an outcome. NET's JObject, JArray and JValue objects. The internal interpretation of any JSON Serialization Processor for this particular object would have to be a dictionary that contains regular [Key,Value] Pairs, But in certain buckets, the value in each [Key,Value] is either a sub-dictionary or a collection of sub-dictionaries. py for example usage. Data Converter. JSON (JavaScript Object Notation) is a lightweight data-interchange format. Notice that the top-level object is a dictionary with the keys latitude, longitude, timezone, currently, and minutely. Dictionary specification is simple. Text = obj2["address1"]. If there is a mapping, it uses the mapped property name instead. load, the many dictionaries (that are appended in real time) need to be enclosed in a list. How can I sort this data so that. Editor’s Note: This week, Ziad Tamim will show you how to fetch and parse JSON. Python JSON Module Tutorial: In Python the json module provides an API similar to convert in-memory Python objects to a serialized representation known as JavaScript Object Notation (JSON) and vice-a-versa. JSON is derived from a subset of JavaScript programming language (Standard ECMA-262 3rd Edition—December 1999). Most classes in the API adopt the AGSCoding protocol. creating level editors. Dictionary`2[System. It takes as input the JSON object (represented as a Python dict) and, optionally, a build direction and a dictionary of table attributes to customize the generated table:. Generate Plain Old Java Objects, XML from JSON or even JSON-Schema. How to call php json webservice in android State of Nebraska. 1, unless the processingMode API option is explicitly set to json-ld-1. NET Fiddle code editor. On the Smalltalk client, the low-level serialization mechanism for objects will use the same JSON format. Refer to BBCode help topic on how to post. An ordered list of values. My ConvertTo-Hashtable function allows you to convert JavaScript Object Notation (JSON) data format to a native PowerShell hash table. JSON to CSV: Transcode JSON to CSV Offline with Best Data Tool JSON (JavaScript Object Notation) is a lightweight format that is used for data interchanging. It is used primarily to transmit data between a server and web application, as an alternative to XML. This makes it a pain to work with. For SharePoint administrator is natural to fall back to PowerShell to perform those tasks and automate the. REST API concepts and examples - Duration: 8:53. JSON (JavaScript Object Notation) is a lightweight data interchanging format. Serializing JSON. What I landed on after frustrating over it for days was something like this. JSON (JavaScript Object Notation) is language-neutral data interchange format. Json library and includes it in the MVC and other Visual Studio templates. NET type objects into JSON-encoded data and then deserialize data in the JSON format back into instances of. See also the release notes / change log. Serialize an Object. According to Wikipedia, JSON is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute-value pairs and array data types (or any other serializable value). The Prettifier - JSON Enter your JSON via direct input or URL to have it. JSON data structures map directly to Python data types, which makes this a powerful tool for directly accessing data without having to write any XML parsing code. Due to its syntactic simplicity and flexibility, JSON (JavaScript Object Notation) has become pretty much the de-facto standard data exchange format used in many web applications. JSON is built on two structures: A collection of name/value pairs. I thought about several ways to represent a set in JSON. With the prevalence of web and mobile applications, JSON has become the de-facto interchange format for web service API’s as well as long-term. Often, developers include a nicely formatted version of the JSON data that their API will return, so look for that in their documentation. (dictionary). For deeply-nested JSON, it breaks the XPath-like query interface. As shown in the json module docs, this conversion can be done automatically by a JSONEncoder and JSONDecoder, but then you would be giving up some other structure you might need (if you convert sets to a list, then you lose the ability to recover regular lists; if you convert sets to a dictionary using dict. The best way depends on what you're going to do with it. JSON Formatter Online and JSON Validator Online work well in Windows, Mac, Linux, Chrome, Firefox, Safari, and Edge and it's Free. Merriam-Webster's Collegiate® Dictionary with Audio. Online JSON beautifier. Upload JSON File and Start Editing. 6m developers to have your questions answered on Binding to JSON only containing list of values, not dictionary of Kendo UI for jQuery Data Source. The examples on this page attempt to illustrate how the JSON Data Set treats specific formats, and gives examples of the different constructor options that allow the user to tweak its behavior. It has various modes such as a tree editor, a code editor, and a plain text editor. Boolean] Been trying to figure this out for a few hours now, and after much googling I can't seem to figure it out. The JSON is loaded into a new variable not because it is new information, but to show that the values in the new dictionary, i. dumps and json. A dictionary is a data structure and json is a data format. A dictionary is a type of collection that you can access using a key. NET comes with the StringEnumConverter to convert between an enum and the JSON string representation. json and project. generate c# classes from a json string or url. Hey, Fellow REST API Designer! Building RESTful web services, like other programming skills is part art, part science. dumps(dg3)? That is where python converts the native dictionary type to json data before submitting the payload. It is defined in RFC 7159. Hi Daniel, I also struggled with getting the request right. So, I have a directory called 'json_to_csv' which has another directory called 'descriptions' in it, which contains some 250+ large json files, which I need to parse and convert it to csv. This script can handle nested json with multiple objects and arrays. Hope you find this helpful someday!. You can more or less roll your own way of serializing the data. One note, if you are comparing JSON files that contain data expected to change (like timestamps) json-delta can be used to remove that data (via its patch capability) prior to doing your compare. Finally I generated a new JSON string with json. The electronic resource that lists the words of a language in alphabetical order and gives their meaning, or gives the equivalent words in a different language, often also providing information about pronunciation, origin, and usage. To get the item's properties as JSON, cast the Item object as a dictionary like below and write that to a file:. JSON Editor Online is a web-based tool to view, edit, and format JSON. Over the last 5-10 years, the JSON format has been one of, if not the most, popular ways to serialize data. It grew out of the excellent project vba-json, with additions and improvements made to resolve bugs and improve performance (as part of VBA-Web). Thus it is RECOMMENDED that generic XDI dictionary words be specified in an XDI community dictionary cooperatively maintained by the XDI authorities contributing to that community. Unity is the ultimate game development platform. The Linked Data Service provides access to commonly found standards and vocabularies promulgated by the Library of Congress. According to Wikipedia, JSON is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute-value pairs and array data types (or any other serializable value). It's used throughout the web, apps, and online services, because the format is simple and flexible. dumps() function may be different when executing multiple times. It's also a JSON File Editor. JSON array can store string, number, boolean, object or other array inside JSON array. All the words are assigned with 1 in the dictionary. Javascript Object Notation online job support is ideal for transferring data that can be stored as ordered lists or key value pairs. Example of France by department dictionary:. A protip by hartleybrody about python and json. Reading JSON data from a file is very easy. 0-rc2 Introduction JSON (JavaScript Object Notation) is a lightweight data-interchange format. I am currently getting JSON data from the discogs API (mp3 tag data) and wish to sort the results by the key's value. Dictionary) 1. XML to JSON python script (Also JSON to XML) Here are 2 python scripts which convert XML to JSON and JSON to XML. This article covers how it is done and includes a benchmark comparing it with traditional Rails JSON generation techniques. Converters work by returning dictionaries of property value pairs that the serializer eventually outputs as JSON. Then it loops through the properties (or attributes) of the JSON object being deserialized and for each property it checks to see whether there is a mapping in the _propertyMappings dictionary. Unfortunately this being CRM Online I can't use there wrappers which would have made things a lot easier. load (open ('data. Active 6 years, 1 month ago. Nested JSON to CSV Converter. It grew out of the excellent project vba-json, with additions and improvements made to resolve bugs and improve performance (as part of VBA-Web). You cannot copy a dictionary simply by typing dict2 = dict1, because: dict2 will only be a reference to dict1, and changes made in dict1 will automatically also be made in dict2. org maintains an extensive list of JSON libraries and they are categorized in programming languages. After conversion, you can beautify JSON and download converted JSON data to your device. I'm using nested dictionaries to create the json structure for the POST request within SharePoint Designer but I'm not sure how to create a JSON array as needed by the "results" field. Additionally, this is probably not the most efficient way to achieve this. The library parses JSON into a Python dictionary or list. Let's see how JSON's main website defines it: Thus, JSON is a simple way to create and store data structures within JavaScript. To get the item's properties as JSON, cast the Item object as a dictionary like below and write that to a file:. If you are fine with non-printable symbols in your json, then add ensure_ascii=False to dumps call. References. A JSON representation of Webster's Unabridged Dictionary - adambom/dictionary. I not always know what the API sends back so after all I need it to do it in a different way. stringify to convert an array or values into a JSON formatted string. A complete reference guide to the Merriam-Webster JSON data format. …This is a string based key with one value. The tutorial may be a bit complicated than other tutorials we covered before. Python has a package json that handles this process. Microsoft Scripting Guy, Ed Wilson, is here. Create a new Python file an import JSON; Crate a dictionary in the form of. This video shows how to create a Dictionary App using Json Object and Map variable in Sketchware. All other key are optional and are here to better match user data. An ordered list of values. JSON to CSV Python Code. Best practice is to create an extension of NSDictionary and add a function with a name of your choice. JSON data structures map directly to Python data types, which makes this a powerful tool for directly accessing data without having to write any XML parsing code. Précis I struggled with the title for this blog; dare i say, after spending almost two days trying to make SharePoint Designer 2013 and Visual Studio 2012 Workflow return data from a few notable providers [YouTube, Twitter, iTunes] using the Dynamic Value / Dictionary Data Type in JSON format, and not being able to as […]. Therefore, there will be no whitespace between field names and its value, object fields, and objects within arrays in the JSON output. The image appears on page 227 of The Dictionary of Dublin: Being a Comprehensive Guide to the City and its Neighbourhood by E. Select JSON Fuzz or start typing json fuzz until it autocompletes. Dictionary specification is simple. Enter your JSON and your query and immediately see the extracted results in the browser. Finding fun public JSON feeds to experiment with is surprisingly difficult, so I thought I'd compile a list of as many interesting and useful examples as I could find. It's used in most public APIs on the web, and it's a great way to pass data between programs. I am new to Python, APIs and JSON, so please bare with me: I am making a request to an API that will return a JSON object. Many programming languages have built in functions for transforming json to dictionaries (e. Boolean] Been trying to figure this out for a few hours now, and after much googling I can't seem to figure it out. On the Smalltalk client, the low-level serialization mechanism for objects will use the same JSON format. Because it is a standard format, you can write JSON in one language and read JSON from another language to effectively pass information between the two programs or applications. JSON Brief Introduction. Online JSON Formatter and Online JSON Validator also provides tools to convert JSON to XML, JSON to CSV, JSON Editor, JSONLint and JSON Checker. NET Documentation. I spent 4 hours behind this and found extremely good solution. Non-JSON documents may be desirable if migrating a legacy application which is using a customized binary format. Updated for Swift 4 on 2017/09/06 - Because I always end up Googling NSJSONSerialization and its options Dictionary to JSON string The dictionary is converted to Data which contains an UTF8 encoded string inside. This article demonstrates how to serialize. These properties make JSON an ideal data-interchange language. These allow us to return JSON directly from the database server. The app’s Info. The internal interpretation of any JSON Serialization Processor for this particular object would have to be a dictionary that contains regular [Key,Value] Pairs, But in certain buckets, the value in each [Key,Value] is either a sub-dictionary or a collection of sub-dictionaries. Json ML can help when building UI in Ajax applications and can easily be used to bind behaviors to DOM elements for implementing techniques such as Progressive Enhancement. The json module makes it easy to parse the JSON strings and files containing the JSON object. json_attributes. I mentioned my idea of implementing a custom exporter to JSON to drive Philippe Leefsma's online 3D WebGL viewer. NET’s LINQ to JSON to wrangle some oddly-shaped JSON into a Dictionary. This includes data values and the controlled vocabularies that house them. To accomplish getting data from JSON or creating JSON text from a custom object we will use JSON serialization and deserialization in C#. The output refers to the "DICOM JSON Model", which is found in DICOM Part 18 Section F. You can use the Foundation framework’s JSONSerialization class to convert JSON into Swift data types like Dictionary , Array , String , Number , and Bool. for the values i pass only the last grid row gets taken in and not the ones before that into the variable. but for that it needs a class. dumps and json. The JSON Serialization feature converts objects to and from JSON format. – dumbledad Mar 22 at 10:12. each segment of the document is stored in a cell. That's what JSON is. CSharp Viewer - Convert CSharp Strings to a Friendly Readable Format,Beautify,Minify. If not passed, data will be assumed to be an array of records. Everywhere I look online people can just shove the JSON object into a python dictionary with some member function and then index into the dictionary. The Conversion from JSON to Python - Parse JSON If you wish to parse any python parse json string that you already have then you can do that with the help of the json. I've successfully connected to and loaded the list using Powershell, but I'm unsure what the best process to retrieve the items as json would be? Should it I just iterate over them, put them into an object and then serialize it using json. There are many option to tailor the beautifier to your personal formatting tastes. Google has an excellent web service that allows us to make use of their large database of geographic information. And everything still works the same. Extended JSON Grammar The JSON-B, JSON-C and JSON-D encodings are all based on the JSON grammar [] using the same syntactic structure but different lexical encodings. 1 day ago · The Gerstein Science Information Centre is the University of Toronto's flagship library supporting the sciences and health sciences. Language pack converter. Now lets we perform our first encoding example with Python. JSON Dictionary and GPU calculations for Graphics Card Posted 18 December 2013 - 03:19 PM I am not a C# programmer, what I would like to do is update A top end Dell Server that has been pretty much maxed out by the client. The JSON string needs to be wrapped by parenthesis, else it will not work! This is the #1 problem when programmers first start to manipulate JSON strings. There are ways to make a copy, one way is to use the built-in Dictionary method copy(). How to achieve this?. The availability of parsers in nearly every programming language is one of the advantages of JSON as a data-interchange format. But to load json data normally with json. Technology Dictionary. While the object is list follow the below code to convert to the pure JSON format. Welcome to Merriam-Webster's Developer Center! The Merriam-Webster Dictionary API gives developers access to a comprehensive resource of dictionary and thesaurus content as well as specialized medical, Spanish, ESL, and student-friendly vocabulary. Customer Feedback for the Provider Directory and Drug Formulary Submit questions using the "Submit a Question" link to the right, and browse already answered questions in the Knowledge Base below. It also parses JSON into a dictionary or list in Python and vice versa, that is converting a Python dictionary or list into JSON strings. How to parse JSON data in Nintex Workflow for Office 365 - Kloud Blog A workflow is usually described as a series of tasks that produce an outcome. PyObject pyObj - The Python object to encode into JSON such as a Python list or dictionary. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. NET Documentation. Read more: json. The JSON file is uploaded to a team site library. Notice that the top-level object is a dictionary with the keys latitude, longitude, timezone, currently, and minutely. What is a 'JSON Dictionary' and can one be set up inside of the API plugin in Bubble? The value of "customer_properties" needs to b…. JSONify It is a CSV to JSON converter designed to help you easily convert tabular data from spreadsheets, CSV files or any delimited file into JSON. The JSON is loaded into a new variable not because it is new information, but to show that the values in the new dictionary, i. I am new to Python, APIs and JSON, so please bare with me: I am making a request to an API that will return a JSON object. ## JSON JSON( Java Script Object Notation) is a lightweight text based data-interchange format which is completely language independent. I have written converter code in a class library and then consuming this library on a test project for testing. dumps(), encoded to UTF-8, got the byte array, and wrote it to the output stream. json both have their package references. Hi, How can I convert from a Dictionary or NameValueCollection into a Json string which can later go through the reverse process? I have tried the following source code, but it doesn't output the v. They are incorrect JSON, but I had tabs and newlines (that is byte value 13, not the two characters " ") in one string inadvertently and they used to work in PHP5. When a dictionary is converted into JSON, all the keys of the dictionary are coerced to strings. New here? Start with our free trials. " To learn more about JSON in general terms, read the "An Introduction to JSON. Convert C# classes to JSON objects. Serialization namespace is used to serialize the dictionary object into json data array and then it is displayed in the div. Hope you find this helpful someday!. All the words are assigned with 1 in the dictionary. Is it possible to do this using dapper in some way without using another property in Foo that contains the json representation?. To serialize a collection - a generic list, array, dictionary, or your own custom collection - simply call the serializer with the object you want to get JSON for. JSON is a attractive option for setting up a custom analytics data store. A dictionary is a type of collection that you can access using a key. It shows your data side by side in a clear, editable treeview and in a code editor. Longer version: Json. Refer to BBCode help topic on how to post. Building PowerShell Arrays and Hashtables for JSON Payloads Posted by Chris Wahl on 2016-02-18 in Random | 10 Responses While tinkering around with Slack's Incoming Webhooks feature, I came upon the ability to add message attachments. The dictionary content is licensed from Oxford University Press's OxfordDictionaries. That's what JSON is. dumps(my_list) [/code]. NET Documentation. JSON Dictionary and GPU calculations for Graphics Card Posted 18 December 2013 - 03:19 PM I am not a C# programmer, what I would like to do is update A top end Dell Server that has been pretty much maxed out by the client. AV Dictionary is audio and video dictionary. Make your JSON in the same format and it should load just fine. dumps() function takes an indent argument that automatically formats things legibly for you:. If it is JSON then it is already a string. We are going to use json module in this tutorial. sandboxapi¶. Net framework for serializing data into JSON format. However, it gives the user the ability to modify the JSON representation of the script. Free online JSON to string converter. There are ways to make a copy, one way is to use the built-in Dictionary method copy(). He also practised as a professional genealogist and published transcripts of many original documents relating to Somerset. Get JSON data. txt as json format. NET in multiple ways. This is actually really easy: [code]import json my_list = [ 'a', 'b', 'c'] my_json_string = json. However, the Google Dictionary website was terminated on August 5, 2011 after part of its functionality was integrated into Google Search using the define: operator. words_dictionary. The JSON output from different Server APIs can range from simple to highly nested and complex. Hi, How to read json file in Scala and use its content? e. Using different seeds makes dictionary attacks slower but does not prevent them if user supplied passphrase is guessable. Reading the JSON file within the script. A cJSONDictionary instance can be created from a JSON string via the cJSONParser or be manually created. What is a 'JSON Dictionary' and can one be set up inside of the API plugin in Bubble? The value of "customer_properties" needs to b…. The json module enables you to convert between JSON and Python Objects. This module provides a single convert function. JSON was not designed to have such features, even though some of them are now trying to find their places in the JSON world, including JSONPath for querying, some tools for transformations, and json-schema for validation. JSON Editor Online helps to Edit, View, Analyse JSON data along with formatting JSON data. ToString(); I had to modify the following in the JSON string. In line 2, we get an NSArray latestLoans which is the loans key in the top JSON dictionary. Dictionaries are another example of a data structure. It's a json file, each object refer to a polygon and the first key is the standard identifier use in the geometry. NET comes with the StringEnumConverter to convert between an enum and the JSON string representation. I wasn't able to find a clear example where it was fully dynamic based of the query that had been run. How to parse JSON data in Nintex Workflow for Office 365 - Kloud Blog A workflow is usually described as a series of tasks that produce an outcome. json-to-csv. A JSON representation of Webster's Unabridged Dictionary - adambom/dictionary. json2csharp is joining forces with quicktype to offer new and improved features including JSON attributes, PascalCase properties, modern C# syntax (nullables, expression members), Dictionary detection, class deduplication, and more. JSON is a lightweight data-interchange format. My program is supposed to read a log file in real time, parse through lines by regex, compile the groups into a dictionary, then export it as JSON (to use them in another program). I have below code ( found on web ) modified a bit but is not parsing the whole file only few lines: appreciate any help!. I added the. NET in multiple ways. In this blog, we will learn how to convert JSON to XML and XML to JSON JSON. Typically you transfer JSON data using Ajax, which lets your web application exchange data and messages between the browser and the server without having to reload the page. "GB"-> "United Kingdom"). Boolean] Been trying to figure this out for a few hours now, and after much googling I can't seem to figure it out. At a high level, the sync is performed by generating a JSON file with the property values for each user in AD. GitHub Gist: instantly share code, notes, and snippets. You need to parse your file line by line: import json data = [] with open (. The library parses JSON into a Python dictionary or list. I was wondering whether you have any idea of how to parse the data to a. The JSON is loaded into a new variable not because it is new information, but to show that the values in the new dictionary, i. you can use the json. Welcome to our reviews of the json validator microsoft (also known as US Navy WW2 Service Records). So you need an intermediate representation in order to pass data between them. For instance this large json file can not be parsed with dictionaries because parsed object uses more that 2GB or RAM. A dictionary is a type of collection that you can access using a key. / Functions and Operators / JSON Functions / Functions That Search JSON Values 12. In layman’s terms, it is a string of text that represents a universal data structure. NET's LINQ to JSON to wrangle some oddly-shaped JSON into a Dictionary. The dictionary containing JSON data is passed to the json parameter. JSON functions in SQL Server enable you to analyze and query JSON data, transform JSON to relational format, and export SQL query results as JSON text. NET is concerned, we have not tried to port its source code to CSHTML5 yet, but maybe someone in the community can try to do so. You could use JSON by using some kind of JSON library ( for example my SimpleJSON class) and implement your own serialize / deserialize methods to map. Code to sort the String list: Collections. To accomplish that I read a JSON file and save it to a dictionary using swiftyJSON. When a dictionary is converted into JSON, all the keys of the dictionary are coerced to strings. simplejson — JSON encoder and decoder¶ JSON (JavaScript Object Notation), specified by RFC 7159 (which obsoletes RFC 4627) and by ECMA-404, is a lightweight data interchange format inspired by JavaScript object literal syntax (although it is not a strict subset of JavaScript ). It was created and popularized by Douglas Crockford. We can also convert any JSON received from the server into JavaScript objects. stringify() function is included in all major browsers and in the latest ECMAScript (JavaScript) standard. LINQ to JSON Create, parse, query and modify JSON using Json. dump (jData, jsonfile, indent = 2, sort_keys = True). -e "status" picks the element with the "status" index from the second level dictionary picked above. The JSON is loaded into a new variable not because it is new information, but to show that the values in the new dictionary, i. Features of this dictionary. See screenshots, read the latest customer reviews, and compare ratings for JSON Formatter for Edge. Python is getting popular and becoming the first choice of startup development. Before you can start working with JSON in Python, you'll need some JSON to work with. The number of spaces to add to each level of indentation for prettyprinting. GitHub Gist: instantly share code, notes, and snippets. JSON conversion and parsing for VBA (Windows and Mac Excel, Access, and other Office applications). This JSON describes a user’s messages. Know more about JSON. Dictionary obj2 = (Dictionary)objTemp; lblAddress. Google Dictionary has an undocumented API that's used in Google Docs. That dictionary can be used as a dictionary, or it can be imported into an object as it's instantiated to transfer data into a new object. JSON Editor Online is a web-based tool to view, edit, and format JSON. Now, since we are using JSON as our data format, we were able to take a nice shortcut here: the json argument to post. What I want to know is if my approach is a good idea, and maybe discuss some alternative implementations. Processors default to json-ld-1. According to the code, I assumed it would be "item": "ore:logWood", however it says that this is a Unknown item and doesn't exist. I would like to navigate through a complex JSON Dictionary and format it to be usable in an Excel file. But if you have the JSON data available, you should instead work with the data, without using a string at all. You can get that from NuGet. JSON (JavaScript Object Notation) is a lightweight data-interchange format. Definition and Use of Dictionaries¶ In common usage, a dictionary is a collection of words matched with their definitions. References. SerializeObject( myDictionary ); As opposed to JavaScriptSerializer, myDictionary does not have to be a dictionary of type for JsonConvert to work. HTML To JSON Converter lets you convert HTML to JSON online. And JSON has one superb capability: you can encode any data format in JSON, and decode JSON back to any data format. This script can handle nested json with multiple objects and arrays. LINQ to JSON Create, parse, query and modify JSON using Json. Following is a Java example where we shall create an Employee class to define the schema of data in the JSON file, and read JSON file to Dataset.