Getting Data from a Package

The examples in this section use the aleksey/hurdat demo package:

import quilt3
p = quilt3.Package.browse('aleksey/hurdat', 's3://quilt-example')
p

Loading manifest: 100%|██████████| 7/7 [00:00<00:00, 8393.40entries/s]





(remote Package)
 └─.gitignore
 └─.quiltignore
 └─notebooks/
   └─QuickStart.ipynb
 └─quilt_summarize.json
 └─requirements.txt
 └─scripts/
   └─build.py

Slicing through a package

Use dict key selection to slice into a package tree:

# returns PackageEntry("requirements.txt")
p["requirements.txt"]

PackageEntry('s3://quilt-example/aleksey/hurdat/requirements.txt?versionId=bQtxuZlaylNVHi0GmxkSMofT5qXJvP95')

# returns (remote Package)
p["notebooks"]

(remote Package)
 └─QuickStart.ipynb

Slicing into a Package directory returns another Package rooted at that subdirectory. Slicing into a package entry returns an individual PackageEntry.

Downloading package data to disk

To download a subset of files from a package directory to a dest, use fetch:

# download a subfolder
p["notebooks"].fetch()

# download a single file
p["notebooks"]["QuickStart.ipynb"].fetch()

# download everything
p.fetch()

Copying objects: 100%|██████████| 36.7k/36.7k [00:01<00:00, 22.7kB/s]
100%|██████████| 36.7k/36.7k [00:01<00:00, 24.1kB/s]
Copying objects: 100%|██████████| 39.9k/39.9k [00:02<00:00, 16.5kB/s]





(local Package)
 └─.gitignore
 └─.quiltignore
 └─notebooks/
   └─QuickStart.ipynb
 └─quilt_summarize.json
 └─requirements.txt
 └─scripts/
   └─build.py

fetch will default to downloading the files to the current directory, but you can also specify an alternative path:

p["notebooks"]["QuickStart.ipynb"].fetch("./references/")

100%|██████████| 36.7k/36.7k [00:01<00:00, 22.5kB/s]





PackageEntry('file:///Users/gregezema/Documents/programs/quilt/docs/Walkthrough/references/')

Downloading package data into memory

Alternatively, you can download data directly into memory:

p["quilt_summarize.json"].deserialize()

['notebooks/QuickStart.ipynb']

To apply a custom deserializer to your data, pass the function as a parameter to the function. For example, to load a hypothetical yaml file using yaml.safe_load:

import yaml
# returns a dict
p["quilt_summarize.json"].deserialize(yaml.safe_load)

['notebooks/QuickStart.ipynb']

The deserializer should accept a byte stream as input.

Getting entry locations

You can get the path to a package entry or directory using get:

# returns /path/to/pkg/root/notebooks/QuickStart.ipynb
p["notebooks"]["QuickStart.ipynb"].get()

's3://quilt-example/aleksey/hurdat/notebooks/QuickStart.ipynb?versionId=PH.9gsCH6LM9RQIqsy1U4X6H6s.VoQ_B'

Getting metadata

Metadata is available using the meta property.

# get entry metadata
p["notebooks"]["QuickStart.ipynb"].meta

# get directory metadata
p["notebooks"].meta

# get package metadata
p.meta