Hive Developer Portal
Get post details from list of posts from the blockchain with
created filter and tag then display selected post details.
Full, runnable src of Get Post Details can be downloaded as part of: tutorials/python (or download just this tutorial: devportal-master-tutorials-python-05_get_post_details.zip).
We will explain and show you how to access the Hive blockchain using the beem library to fetch list of posts filtered by a filter and tag.
Hive python library has built-in function to get details of post with author and permlink as an argument. Since we don’t have predefined post or author/permlink. We will fetch post list from previous tutorial and give option to choose one option/post to get its details.
get_content function fetches latest state of the post and delivers its details. Note that
get_discussions_by_created filter is used for fetching 5 posts which by default contains details of each post, but for purpose of this tutorial we will showcase
get_content function to fetch details.
- App setup - Library install and import
- Post list - List of posts to select from created filter
- Post details - Get post details for selected post
- Print output - Print results in output
In this tutorial we use 3 packages,
pick - helps us to select filter interactively.
beem - hive library, interaction with Blockchain.
pprint - print results in better format.
First we import all three library and initialize Hive class
import pprint from pick import pick # initialize Hive class from beem import Hive from beem.discussions import Query, Discussions from beem.comment import Comment h = Hive()
Next we will fetch and make list of posts and setup
q = Query(limit=2, tag="") d = Discussions() #post list for selected query posts = d.get_discussions('created', q, limit=2) title = 'Please choose post: ' options =  #posts list for post in posts: options.append(post["author"] + '/' + post["permlink"]) # get index and selected filter name option, index = pick(options, title)
This will show us list of posts to select in terminal/command prompt. And after selection we will get index and post name to
Next we will fetch post details with
get_content. By default
get_discussions_by_created function already contains post details, but for this tutorial purpose we will ignore all other fields but only use
permlink fields to fetch fresh post details.
details = Comment(option)
Next, we will print result, details of selected post.
# print post body for selected post pprint.pprint('Depth: ' + str(details.depth)) pprint.pprint('Author: ' + details.author) pprint.pprint('Category: ' + details.category) pprint.pprint('Body: ' + details.body)
Also see: beem.comment.Comment
The example of result returned from the service:
'Depth: 0' 'Author: hiveio' 'Category: hive' ('Body: ' '\n' '\n' . . .
From this result you have access to everything associated to the post including additional metadata which is a
JSON string (e.g.;
active_votes (see: beem.comment.Comment.get_vote_with_curation) info, post title, body, etc. details that can be used in further development of applications with Python.
id- Unique identifier that is mostly an implementation detail (best to ignore). To uniquely identify content, it's best to use
author- The author account name of the content.
permlink- Permanent link of the content, must be unique in the scope of the
category- The main category/tag this content belongs to.
root_author- Used in conbination with
root_permlink- In conbination with
root_author, distinctly references discussion this content is part of.
parent_author- Parent author, in case this content is a comment (reply).
parent_permlink- Parent permanent link, this will be the same as
categoryfor posts and will contain the
permlinkof the content being replied to in the case of a comment.
title- Title of the content.
body- Body of the content.
json_metadata- JSON metadata that holds extra information about the content. Note: The format for this field is not guaranteed to be valid JSON.
last_update- The date and time of the last update to this content.
created- The date and time this content was created.
active- The last time this content was "touched" by voting or reply.
last_payout- Time of last payout.
depth- Used to track max nested depth.
children- Used to track the total number of children, grandchildren, etc. ...
net_rshares- Reward is proportional to liniar rshares, this is the sum of all votes (positive and negative reward sum)
abs_rshares- This was used to track the total absolute weight of votes for the purpose of calculating
vote_rshares- Total positive rshares from all votes. Used to calculate delta weights. Needed to handle vote changing and removal.
children_abs_rshares- This was used to calculate cashout time of a discussion.
cashout_time- 7 days from the
total_vote_weight- The total weight of voting rewards, used to calculate pro-rata share of curation payouts.
reward_weight- Weight/percent of reward.
total_payout_value- Tracks the total payout this content has received over time, measured in the debt asset.
curator_payout_value- Tracks the curator payout this content has received over time, measured in the debt asset.
author_rewards- Tracks the author payout this content has received over time, measured in the debt asset.
net_votes- Net positive votes
root_comment- ID of the original content.
max_accepted_payout- Value of the maximum payout this content will receive.
percent_hbd- The percent of Hive Dollars to key, unkept amounts will be received as HIVE Power.
allow_replies- Allows content to disable replies.
allow_votes- Allows content to receive votes.
allow_curation_rewards- Allows curators of this content receive rewards.
beneficiaries- The list of up to 8 beneficiary accounts for this content as well as the percentage of the author reward they will receive in HIVE Power.
url- The end of the url to this content.
root_title- Title of the original content (useful in replies).
pending_payout_value- Pending payout amount if 7 days has not yet elapsed.
total_pending_payout_value- Total pending payout amount if 7 days has not yet elapsed.
active_votes- The entire voting list array, including upvotes, downvotes, and unvotes; used to calculate
author_reputation- Author's reputation.
promoted- If post is promoted, how much has been spent on promotion.
body_length- Total content length.
Click the play button below:
To Run the tutorial
- review dev requirements
git clone https://gitlab.syncad.com/hive/devportal.git
pip install -r requirements.txt
- After a few moments, you should see output in terminal/command prompt screen.