Parse and manage posts with YAML (or other) frontmatter
Project description
Python Frontmatter
Jekyll-style YAML front matter offers a useful way to add arbitrary, structured metadata to text documents, regardless of type.
This is a small package to load and parse files (or just text) with YAML front matter.
Install:
pip install python-frontmatter
Usage:
>>> import frontmatter
Load a post from a filename:
>>> post = frontmatter.load('tests/hello-world.markdown')
Or a file (or file-like object):
>>> with open('tests/hello-world.markdown') as f:
... post = frontmatter.load(f)
Or load from text:
>>> with open('tests/hello-world.markdown') as f:
... post = frontmatter.loads(f.read())
Access content:
>>> print(post.content)
Well, hello there, world.
# this works, too
>>> print(post)
Well, hello there, world.
Use metadata (metadata gets proxied as post keys):
>>> print(post['title'])
Hello, world!
Metadata is a dictionary, with some handy proxies:
>>> sorted(post.keys())
['layout', 'title']
>>> from pprint import pprint
>>> post['excerpt'] = 'tl;dr'
>>> pprint(post.metadata)
{'excerpt': 'tl;dr', 'layout': 'post', 'title': 'Hello, world!'}
If you don't need the whole post object, just parse:
>>> with open('tests/hello-world.markdown') as f:
... metadata, content = frontmatter.parse(f.read())
>>> print(metadata['title'])
Hello, world!
Write back to plain text, too:
>>> print(frontmatter.dumps(post)) # doctest: +NORMALIZE_WHITESPACE
---
excerpt: tl;dr
layout: post
title: Hello, world!
---
Well, hello there, world.
Or write to a file (or file-like object):
>>> from io import BytesIO
>>> f = BytesIO()
>>> frontmatter.dump(post, f)
>>> print(f.getvalue().decode('utf-8')) # doctest: +NORMALIZE_WHITESPACE
---
excerpt: tl;dr
layout: post
title: Hello, world!
---
Well, hello there, world.
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