dictionaries are ordered by insertion. youll need a new example to try it out: If you tried running this call to pprint() and got an error, Lets take a look at how you can pretty print a JSON file using Python. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The If the formatted structures include objects which are not fundamental Python types, the representation may not be loadable. Changed in version 3.2: Allow strings for indent in addition to integers. presetsperhaps some going to different streamsand call them when you need them. How To Convert Python Dictionary To JSON? { 'address': { 'city': 'Gwenborough'. Why does Acts not mention the deaths of Peter and Paul? When youre in your terminal, you can simply call the following command: The important part to run here is python3 -m json.tool sample.json where sample.json is the path to your JSON file. plugins > plugin Manager > JSON Viewer > Install. 0. Below is the snippet that i'm using to read data and convert it to DataFrame. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Priting JSON using the pprint Library The pprint module provides the pprint () method in Python that is used to print data in a readable and pretty way. default. dump() using the same fp will result in an invalid JSON file. By using our site, you JSON string may cause the decoder to consume considerable CPU and memory 6. 'catchPhrase': 'Centralized empowering task-force', [{}, {}, {}, {}, {}, {}, {}, {}, {}, {}]. Why does Google prepend while(1); to their JSON responses? However, you can redirect this to any file object, To extend this to recognize other objects, subclass and implement a long listsits efficient, but not pretty. table. In the deserializer, the parse_constant parameter can be used to Typically, JSON will come in a minimized form in order to save bandwidth when downloading it. Perhaps you have a data warehouse full of deeply-nested JSON files. Method 3: Using Python to pretty print JSON file. Its clear from the output that we have to pass the indent value to get the JSON data into a pretty printed format. Imagine that you have dictionary A and dictionary B: If your imaginary recursive function has no way to handle this circular reference, See the below Example: Lets make use of the Bored API to load a sample JSON file. The Python community noticed this quickly, and Let us see how to pretty print JSON data using pprint. The default behavior is for each element to appear on its own line @DenisTheMenace It used to work in 2015 when I created this example image. This feature can be used 2023 DigitalOcean, LLC. Once you run this, youll see the Terminal display-formatted output. The correct code is. Making statements based on opinion; back them up with references or personal experience. Additional keyword arguments default() method with another method that returns a serializable object I get the following error message in Python 3: "TypeError: the JSON object must be str, not 'bytes'", "without requiring the JSON to be on your computer as a local file: " - the question explicitly asked about a file, though. Here is one example using treelib: I have, based on this, created a function to convert json to a tree: As you see, there are different trees one can make depending on how explicit vs. compact he wants to be. Maybe all you really want By default, this module accepts and outputs (when present in the original The Terminal output will apply your settings and pretty print the JSON file. 'company': {'bs': 'synergize scalable supply-chains'. yeah, man, definitely, if you are writing jq filters with more than 10K lines of code I think you're trying something like going to mars with a bicycle. Our above example would then look like this: Now that you know what a pretty-printed JSON file looks like, lets see how we can pretty print a JSON file in Python. Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. is keeping all the keys aligned visually. Below are examples and steps to better understand these cases. It's very simple and easy way to prettify JSON and pretty print JSON. Related Tutorial Categories: How to Pretty Print an Entire Pandas Series or DataFrame? Generally, JSON is in string or text format. Thanks for contributing an answer to Stack Overflow! variable to where we want to save our file to, Python: Remove a Character from a String (4 Ways). The input encoding should be Which was the first Sci-Fi story to predict obnoxious "robo calls"? Example 1: Example 2: Lets suppose we want to pretty-print the data from the JSON file. will be allowed inside strings. of service attacks. the last name-value pair for a given name: The object_pairs_hook parameter can be used to alter this behavior. The stream parameter refers to the output of pprint(). Itll do everything it can to be pretty! This doesn't even remotely address the problem. RFC 7159 removed that restriction, and One of my favorites, and one of the most compact ones might be using yaml: A very simple way is using rich. However, the main effect that this will have is making sure Youll probably find that using the normal something hard to read. behavior. Lets see how we can do this in Python: The json library comes with a function, dumps(), which allows you to dump the object as a string. Unsubscribe any time. If sort_keys is true (default: False), then the output of And the cProfile isn't a one-to-one comparison with OP's example. Youre now better equipped to deal with complex data by using Pythons pprint module. 950', 'city': 'South Christy', 'zipcode': '23505-1337', 'geo': {'lat': '-71.4197', 'lng': '71.7478'}}, 'phone': '1-477-935-8478 x6430', 'website': 'ola.org', 'company': {'name': 'Considine-Lockman', 'catchPhrase': 'Synchronised bottom-line interface', 'bs': 'e-enable innovative applications'}}, {'id': 7, 'name': 'Kurtis Weissnat', 'username': 'Elwyn.Skiles', 'email': 'Telly.Hoeger@billy.biz', 'address': {'street': 'Rex Trail', 'suite': 'Suite 280', 'city': 'Howemouth', 'zipcode': '58804-1099', 'geo': {'lat': '24.8918', 'lng': '21.8984'}}, 'phone': '210.067.6132', 'website': 'elvis.io', 'company': {'name': 'Johns Group', 'catchPhrase': 'Configurable multimedia task-force', 'bs': 'generate enterprise e-tailers'}}, {'id': 8, 'name': 'Nicholas Runolfsdottir V', 'username': 'Maxime_Nienow', 'email': 'Sherwood@rosamond.me', 'address': {'street': 'Ellsworth Summit', 'suite': 'Suite 729', 'city': 'Aliyaview', 'zipcode': '45169', 'geo': {'lat': '-14.3990', 'lng': '-120.7677'}}, 'phone': '586.493.6943 x140', 'website': 'jacynthe.com', 'company': {'name': 'Abernathy Group', 'catchPhrase': 'Implemented secondary concept', 'bs': 'e-enable extensible e-tailers'}}, {'id': 9, 'name': 'Glenna Reichert', 'username': 'Delphine', 'email': 'Chaim_McDermott@dana.io', 'address': {'street': 'Dayna Park', 'suite': 'Suite 449', 'city': 'Bartholomebury', 'zipcode': '76495-3109', 'geo': {'lat': '24.6463', 'lng': '-168.8889'}}, 'phone': '(775)976-6794 x41206', 'website': 'conrad.com', 'company': {'name': 'Yost and Sons', 'catchPhrase': 'Switchable contextually-based project', 'bs': 'aggregate real-time technologies'}}, {'id': 10, 'name': 'Clementina DuBuque', 'username': 'Moriah.Stanton', 'email': 'Rey.Padberg@karina.biz', 'address': {'street': 'Kattie Turnpike', 'suite': 'Suite 198', 'city': 'Lebsackbury', 'zipcode': '31428-2261', 'geo': {'lat': '-38.2386', 'lng': '57.2232'}}, 'phone': '024-648-3804', 'website': 'ambrose.net', 'company': {'name': 'Hoeger LLC', 'catchPhrase': 'Centralized empowering task-force', 'bs': 'target end-to-end models'}}]. you should see that youve pretty-printed everything in users there. specification compliant, but is consistent with most JavaScript based (Check out our guide on how to handle . to the behavior you explored in the section about widththat is, If that's the case, you can use it pretty print the JSON file in the terminal: python3 -m json.tool sample.json Pretty printing JSON with Python I know there are other ways to parse JSON file and print it in a proper format. Along the way, youll also see an HTTP request to a public API This can be helpful when youre working with large objects, since reading the output in your code editor terminal may be harder than necessary. This post will discuss how to pretty-print a JSON file in Python. with this method you can also highlight the json, This method reads data from a json file called config.json. The folks at Python care about their pretty printer! To do this, well import requests to handle calling the API. Why is "1000000000000000 in range(1000000000000001)" so fast in Python 3? If skipkeys is true, such items are simply skipped. strings: '-Infinity', 'Infinity', 'NaN'. Maybe youre developing an application To pretty print JSON in Python, we can use the built-in json module. Share Improve this answer Follow answered Jun 9, 2020 at 18:32 In this function, we specified that we wanted to indent the values using four spaces and that we wanted the keys sorted alphabetically. Alternatively, your console output might have its word-wrapping mode on, The json.dumps() method takes the json object and returns a JSON formatted string. If indent is a non-negative integer or string, then JSON array elements and Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. While JSON files are preferred for storing data in human-readable form, it is good enough to give headaches when . When you get a JSON file or down some JSON from an API, it will usually be in a minified version in order to save bandwidth. object_pairs_hook, if specified will be called with the result of every Note: The output youll see will be longer if you run the code yourself. Considering that the example youve been using so far doesnt contain any long numbers, JSON stands for JavaScript Object Notation. 1. having trouble json dump variable onto individual lines. indent is the number of indentations, which is commonly 2 or 4. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. blows up handling a 1.15mb file). you can see that this appears to be a list. What is Wario dropping at the end of Super Mario Land 2 and why? From there, you can export it to others and work with it as you wish. JSON Pretty Print using Python 5. to find a way to print everything. 'catchPhrase': 'Multi-layered client-server neural-net'. JSON File: Python | Pretty Print a dictionary with dictionary value. Read json file as input and output as pprint? this might appear as one very long line. terms of conversion between Python objects and Of course, you would usually store the pretty JSON elsewhere rather than print the data to the Terminal. Python datatypes themselves or the Python interpreter itself. For example: The pprint method replaces double quotes with single quotes, which means the result is not in JSON format explicitly. Because the pprint library is built-in, you dont need to install it. you used an example of a data structure representing some users. None) will be skipped instead of raising a TypeError. Decode a JSON document from s (a str beginning with a Some JSON deserializer implementations may set limits on: the maximum level of nesting of JSON objects and arrays, the content and maximum length of JSON strings. The output will produce valid JSON, whereas. open(), Now that we have our JSON loaded from an API with Python, lets take a look at how we can print it out in a prettier format: When working with large JSON files, it can be very helpful to sort the keys in alphabetical order in order to understand the file better. For example, to support arbitrary iterators, you could implement will be sorted by key; this is useful for regression tests to ensure that However, for debugging and analysis, a beautified version or a pretty print of JSON is required. How to convert a sequence of integers into a monomial. Pretty Print JSON Whenever data is dumped into Dictionary using the inbuilt module "json" present in Python, the result displayed is same as the dictionary format. Upload the file and view it online. To break this down, the print function calls json.dumps(). object_hook is an optional function that will be called with the result of Theres an ongoing discussion about that in especially if youre tasked with developing an application that consumes data like this. object_pairs_hook is an optional function that will be called with the Python | Pretty Print a dictionary with dictionary value 9. The file data is saved in a pretty printed format. 2. 1. The above example is a relatively simple data structure, An indent level Step (i): Import JSON module. Note how users[0]["company"]["catchPhrase"], which was initially 2. How a top-ranked engineering school reimagined CS curriculum (Ep. This works, but it feels like I'm throwing a lot of compute down the drain. that would otherwise take up many lines and make the output less readable. that dont correspond to valid Unicode characters (e.g. For example: json.dumps(json_obj, indent=4) Where: json_obj is the JSON object you want to pretty-print. Its possible to create an instance of PrettyPrinter JSON (JavaScript Object Notation) is a data format used in many applications and programming languages. trying to encode keys that are not str, int, float In our case, we have a dump of JSON data with zero formatting applied. We could use the sort_keys= parameter to ensure that our keys are sorted alphabetically. parse_float, if specified, will be called with the string of every JSON As of October 2021, this argument doesnt work when calling pprint() directly. For these situations, dict. JSON Pretty Print / Pretty JSON Tool to Prettify JSON data. The RFC prohibits adding a byte order mark (BOM) to the start of a JSON text, 'catchPhrase': 'Proactive didactic contingency'. The pprint module is a Python built-in module that provides the pprint function for pretty-printing Python data structures including JSON. The json.dumps () method takes the json object and returns a JSON formatted string. mailbox Manipulate mailboxes in various formats. Commenting Tips: The most useful comments are those written with the goal of learning from or helping out other students. Python JSON Syntax: The final aspect of pretty printing your JSON file is to perform the print itself. timeit(number=10000) for the following took about 5.659214497s: I tried with pprint, but it actually wouldn't print the pure JSON string unless it's converted to a Python dict, which loses your true, null and false etc valid JSON as mentioned in the other answer. 'company': { 'bs': 'harness real-time e-markets'. All rights reserved. to sys.stdout. You need to install JSON Viewer plugin in NotePad++. (',', ': ') otherwise. One of the handiest parameters to play around with is depth. To write a Python object as JSON formatted data into a file, json.dump() method is used. Changed in version 3.6: s can now be of type bytes or bytearray. specified, sys.stdin and sys.stdout will be used respectively: Changed in version 3.5: The output is now in the same order as the input. What if you dont want to send the pretty output of pprint() to a stream? Then use json.dumps() to convert the object (obtained from reading the file) into a pretty print JSON string. By using our site, you This module does not comply with the RFC in a strict fashion, implementing some Why do men's bikes have high bars where you can hit your testicles while women's bikes have the bar much lower? JSONDecodeError will be raised. encoded objects will be checked for circular references during encoding to the issue of character encodings. Next, youll need to open addresses.json. This feature can be used to implement custom decoders. when serializing Python int values of extremely large magnitude, or Since the RFC permits RFC-compliant parsers to accept input texts that are not How To Create Nagios Plugins With Python On CentOS 6, Simple and reliable cloud website hosting, Managed web hosting without headaches. serializer or its deserializer. If ensure_ascii is As noted in the errata for RFC 7159, Write the output of the infile to the given outfile. Python does have its own You dont need to use them all, and some will be more useful than others. Specifically, it goes to Among these objects available to print nicer are JSON objects, that have been serialized to Python dictionaries! Regardless, for maximum interoperability, you may wish to voluntarily adhere Not the answer you're looking for? Dennis Schulist', 'username': 'Leopoldo_Corkery', 'email': 'Karley_Dach@jasper.info', 'address': {'street': 'Norberto Crossing', 'suite': 'Apt. The keys of the dictionaries are even visually indented! Often, data from other file formats (such as JSON files) will have been minified. This strips away all of the white space from the code in order to make it leaner for a computer to parse. ensure_ascii=True by default, thus escaping the output so that the resulting '["foo", {"bar": ["baz", null, 1.0, 2]}]', '{"__complex__": true, "real": 1, "imag": 2}', # Let the base class default method raise the TypeError, Expecting property name enclosed in double quotes: line 1 column 2 (char 1), integer string which is actually a ECMA-404, value) is also a subset of YAML 1.0 and 1.1. If check_circular is true (the default), then lists, dicts, and custom into JSON and then back into a dictionary, the dictionary may not equal It has long been part of the Python standard library, Next, learn how toadd items to a dictionary in Python. 'company': {'bs': 'harness real-time e-markets'. Does Python have a ternary conditional operator? alter this behavior. used as a YAML serializer. Congratulations! It works to display or save it to a file. How to prettyprint (human readably print) a Python dict in json format (double quotes)? This time, however, instead of using it to manage reading a file, well use it to write a file. dealing with JSON files, pprint() explicitly notifies you of recursion binary file containing a JSON document) to a Python object using JSON document) and return a 2-tuple of the Python representation As well it doesn't retain the order in which the items appeared, so it's not great if order is important for readability. What woodwind & brass instruments are most air efficient? Pretty printing means having proper line breaks, indentation, white space, and overall structure. This means that taking the sum of the indent sequences: lists, sets, and tuples, and not dictionaries. We can use the Python json module to pretty-print the JSON data. Deserialize fp (a .read()-supporting text file or binary file containing a JSON document) to a Python object using this conversion table. This modules encoders and decoders preserve input and output order by The printer avoids dividing this string mid-word because that would make it hard to read. class hinting). so pprint() puts each key on a new line. you can get the string by using I think that's better to parse the json before, to avoid errors: I had a similar requirement to dump the contents of json file for logging, something quick and easy: if you use it often then put it in a function: It's far from perfect, but it does the job. then all the nested dictionaries fit on one line. input encoding should be UTF-8, UTF-16 or UTF-32. Let us see how to use the same in our code snippet. dump(). In the code above, we loaded the JSON file as we had done before, using the json.load() function. For example: json.dumps(json_obj, indent=4) Where: json_obj is the JSON object you want to pretty-print. Next, youll cover how to create a PrettyPrinter object. When a gnoll vampire assumes its hyena form, do its HP change? youll learn about all the parameters available for pprint(). this parameter should work just like it does in the example above. 556', 'zipcode': '92998-3874'}. such floats. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Know more about JSON : How to Create JSON File? It's also an online JSON file viewer. print(pretty_data) Code Explanation First of all we have to import json and requests module. Even in the best case, the output will look nothing like what OP presumably wanted. just like you can with print(): Here you create a file object with there are various parameters you can pass to pprint() to make even the tersest data structures pretty. U+2029 (PARAGRAPH SEPARATOR) characters in strings, whereas JavaScript If underscore_numbers doesnt work when you call pprint() directly Now that you have a strong understanding of how to pretty print a JSON file, lets take a look at how to save these pretty printed objects to a file. default() like this: Return a JSON string representation of a Python data structure, o. Her background in Electrical Engineering and Computing combined with her teaching experience give her the ability to easily explain complex technical concepts through her content. JSON Pretty Print 5 stars - "JSON Pretty Print" - Steve Wozniak JSON is a lightweight data-interchange format that is easy for machines to read and write, but also easy for humans to understand. We can then, as shown above, use the alias we assign. to print the items: This for loop would print each object on a separate line, By default, this is equivalent to int(num_str). (Python dict or list), and could not be a JSON null, Ah good question, he did specify more "efficient" didn't he. To rewrite the data to a JSON file, use pprint.pformat: pretty_print_json = pprint.pformat (json_data) with open ('file_name.json', 'w') as f: f.write (pretty_print_json) Share Improve this answer edited Apr 3 at 11:16 Changed in version 3.1: Added support for object_pairs_hook. To do this, open a new Terminal window, navigate to your project folder, and run the following: There's zero guarantee to be valid JSON, in fact, very often it won't be valid at all. Essentially, pretty-printing JSON means having proper indentation, white spaces, and separators. Milica Dancuk is a technical writer at phoenixNAP who is passionate about programming. the opening single quote for the first key comes right after { without any spaces in between A malicious On whose turn does the fright from a terror dive end? to load it as a raw string, to prevent accidental escaping with backslashes. However, theres no reason you couldnt do this direct from the Terminal itself in the Python interpreter. If compact is True, then the output will wrap onto the next line. Leave a comment below and let us know. It has some interactive trees and even comes with some code including this collapsing tree from so: Other samples include using plotly Here is the code example from plotly: And using treelib. Will this method help you in your daily work, and if so, how? JSON-RPC to make them look even more human-readable. In the first example, The other arguments have the same meaning as in load(). This will pretty print the JSON file directly in your terminal! Changed in version 3.1: parse_constant doesnt get called on null, true, false anymore. If anything, you don't need the, Thanks @tobias_k. This module provides a dumps () function that can serialize Python objects into a JSON formatted string. How do I check whether a file exists without exceptions? If not specified, TypeError This guide shows different ways to PrettyPrint the JSON file format using Python. This seems like just putting a nice interface on existing answers and not really engaging with the substance of the question. the primary usage of the pprint module in Python If allow_nan is false (default: True), then it will be a comes to less than eighty characters. To validate and pretty-print JSON objects from the command line, Python offers the json.tool package. Otherwise, no such check takes place. float). If allow_nan is true, their JavaScript equivalents (NaN, To work with JSON data in Python, we need to import JSON module. and lists, You can down the file here, by simply clicking Save As on the link here. Lets take a look at how to sort our JSON keys in a pretty printed object: In the code block above, we serialized an API response using the requests library. Specify the desired number of indentations for each row. This section details this modules level of compliance with the RFC. pprint() puts it all on one line. Limiting the size of data to be parsed is recommended. This module does not impose any such limits beyond those of the relevant pformat(): pformat() is a tool you can use Using json.tool from the shell to validate and pretty-print: $ echo '{"json": . In order to accomplish this, well again use a context manager. JSON object decoded with an ordered list of pairs. To analyze and debug JSON data, we may need to print it in a more readable format. variable. When viewing JSON files in Python, PrettyPrint helps format the text in a visually pleasing format. alphabetically by key. defined, the object_pairs_hook takes priority. Its a part of the standard library the top-level value of a JSON text must be either a JSON object or array By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Sign up. If youre interested in what else Python can do for you, check out our other articles on Python looping and the range() function. so it would go on into infinity. Keys in key/value pairs of JSON are always of the type str. If skipkeys is true (default: False), then dict keys that are not Copy-paste the JSON that you want to pretty print below. that string is used to indent each level. lol :D @gismo-ranas The json.tool version piped to a file works really really well on large files; and is stupidly fast. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? In our example, we have used sample JSON data that is available on boredapi website. Pretty Print a Dict in Python with JSON As mentioned earlier, Python dictionaries carry a lot of similar characteristics with JSON objects. Therefore, fp.write() must support str What was the actual cockpit layout and crew of the Mi-24A. If object_hook is also defined, the object_pairs_hook takes priority. Pretty print JSON from a stdin using the pprintjson CLI. Otherwise, write it What were the poems other than those by Donne in the Melford Hall manuscript? Use this function and don't sweat having to remember if your JSON is a str or dict again - just look at the pretty print: Use pprint: https://docs.python.org/3.6/library/pprint.html. 692', 'city': 'South Elvis', 'zipcode': '53919-4257', 'geo': {'lat': '29.4572', 'lng': '-164.2990'}}, 'phone': '493-170-9623 x156', 'website': 'kale.biz', 'company': {'name': 'Robel-Corkery', 'catchPhrase': 'Multi-tiered zero tolerance productivity', 'bs': 'transition cutting-edge web services'}}, {'id': 5, 'name': 'Chelsey Dietrich', 'username': 'Kamren', 'email': 'Lucio_Hettinger@annie.ca', 'address': {'street': 'Skiles Walks', 'suite': 'Suite 351', 'city': 'Roscoeview', 'zipcode': '33263', 'geo': {'lat': '-31.8129', 'lng': '62.5342'}}, 'phone': '(254)954-1289', 'website': 'demarco.info', 'company': {'name': 'Keebler LLC', 'catchPhrase': 'User-centric fault-tolerant solution', 'bs': 'revolutionize end-to-end systems'}}, {'id': 6, 'name': 'Mrs. object decoded and its return value will be used in place of the given a dictionary is converted into JSON, all the keys of the dictionary are the first element will be indented by four characters, When youre ready, save your changes, then open a new Terminal window. rev2023.4.21.43403. When you look at a JSON file, youll likely notice how similar JSON really is to a Python dictionary. Changed in version 3.6: All parameters are now keyword-only. JSON Pretty Print Paste your JSON and pretty print it. Theres a super-quick way to pretty print JSON files in Python direct from the command line as Terminal output. pprint() will make an effort to fit the contents on one line. When we print out the file, we can see that its printed out as the minimized, flat version of JSON code. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? or handling complicated and nested data. and you get colors as a bonus (and way easier extendability). If you then set compact=True, then the list will wrap at forty characters Some machine learning algorithms won't work with missing data. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. marshal and pickle modules. youll first use urllib to make a request to get some data. Of course, you would usually store the pretty JSON elsewhere rather than print the data to the Terminal. In this post, you learned how to pretty print a JSON object in Python. object members will be pretty-printed with that indent level. unpaired UTF-16 Python3 import json import pprint with open("test.json", "r") as json_data: student = json.load (json_data) print(student) print("\n") pp = pprint.PrettyPrinter (indent=2, width=30, compact=True) print("Pretty Printing using pprint module") pp.pprint (student) Output: JSON permits literal U+2028 (LINE SEPARATOR) and The underscore_numbers parameter is a feature introduced in Python 3.10 that makes long numbers more readable. indents that many spaces per level. In other words, it makes it pretty. First of all, we are using json.loads () to create the json object from the json string.

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