Category Archive Python dict to postgresql json

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Python dict to postgresql json

Released: Apr 17, View statistics for this project via Libraries. Tags json, schema, json-schema, jsonschema, object, generate, generator, builder, merge, draft 7, validate, validation.

This is not the Python equivalent of the Java Genson library. Its purpose is to generate the basic structure so that you can skip the boilerplate and focus on the details of the schema. You should be aware that this limited vocabulary could cause GenSON to violate rules 1 and 2. If you feed it schemas with advanced keywords, it will just blindly pass them on to the final schema.

The package includes a genson executable that allows you to access this functionality from the command line. For usage info, run with --help :. SchemaBuilder is the basic schema generator class. SchemaBuilder instances can be loaded up with existing schemas and objects before being serialized. There are several cases where multiple valid schemas could be generated from the same object.

GenSON makes a default choice in all these ambiguous cases, but if you want it to choose differently, you can tell it what to do using a seed schema. Lists have one schema for every item, whereas Tuples have a different schema for every array position. By default, GenSON always interprets arrays using list validation, but you can tell it to use tuple validation by seeding it with a schema.

Note that in this case, the seed schema is actually invalid. But GenSON is a generator, not a validator, so you can fudge a little. You will need to supply an object schema with a patternProperties object whose keys are RegEx strings. Again, you can fudge here and set the values to null instead of creating valid subschemas.

In version 0, GenSON did not accept a schema without a type, but in order to be flexible in the support of seed schemas, support was added for version 1. However, GenSON violates rule 2 in its handling of typeless schemas. Any object will validate under an empty schema, but GenSON incorporates typeless schemas into the first-available typed schema, and since typed schemas are stricter than typless ones, objects that would validate under an added schema will not validate under the result.Turns out that it works quite well.

genson 1.2.0

Get the top N words from passages of text conference calls by companies. Splitting up raw text into sentences and then into words is a non-trivial task.

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Note that I tried using marshal to pack and unpack bytea data into Python dictionaries, but it was no faster perhaps slower than using JSON. Also, I tried applying the word counts to each passage and a Python function to aggregate, but it was much, much slower than aggregating the text and passing to Python in one go.

Note that I am using Counter objects here, but these subclass the standard Python dictionary. Function to get word counts a Python 3 version could omit the. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account.

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You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Skip to content. Home About. Task Get the top N words from passages of text conference calls by companies.

Note that re. Share this: Twitter Facebook. Like this: Like Loading Bookmark the permalink. September 25, at pm. Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Name required. Search for:. Create a free website or blog at WordPress. By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here: Cookie Policy.The support for JSON-functions landed in version 9.

This is a handy feature. Consider a case; Python client fetches 20 records from Postgres. The application or web server converts tuple again back to JSON and sends to the client.

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The mentioned case is common in a web application. But there is a use case. Here is a list of authors in the table. This is simple, let me show a query with an inner join. The book table contains a foreign key to author table. While returning list of books, including author name in the result is useful. As you can see the query construction is verbose. The query has an extra select statement compared to a normal query.

The idea is simple. You can read more about it in the docs. Here is the function that facilitates the conversion in pyscopg2 and pg One way to circumvent the problem is to cast the result as text. So the JSON format is preserved. Another way to run SQL statement is to use text function.

Here is a relevant issue in Pyscopg2. Powered by Tumblr and designed by Kcmr.

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Random stream Free flowing thoughts. Postgres Example Consider two tables, author and book with the following schema. Tags: python postgres.Przemek is the co-founder and CTO of Sunscrapers.

After graduating from the Warsaw University of Technology, he worked as a software consultant. At Sunscrapers, Przemek acts as the technical leader who supervises high-quality service delivery, helps to solve problems, and mentors other team members. While preparing to kick off a new React project at Sunscrapers, we recently faced a dilemma about whether we should design and build our UI components from scratch or [ Get your monthly dose of knowledge about building software for business and tech executives.

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python dict to postgresql json

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One of the most important decisions you will make when building a digital product is choosing the project management methodology. Today, organizations benefit from a wide range of project [ This article is for you. Finding beginner Django tutorials is easy. Get your monthly dose of knowledge about building software for business and tech executives.

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You can also use the random library's Already have an account?

python dict to postgresql json

Sign in. How to convert dictionary to JSON? What am I doing wrong? TypeError: string indices must be integers, not str. Your comment on this question: Your name to display optional : Email me at this address if a comment is added after mine: Email me if a comment is added after mine Privacy: Your email address will only be used for sending these notifications.

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python dict to postgresql json

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Nemi Posted on10:12 pm - Oct 2, 2012

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