terra-notebook-utils

Python API and CLI providing utilties for working with DRS objects, VCF files, and the Terra notebook environment.

Installation

pip install terra-notebook-utils

Credentials

Much of the terra-notebook-utilities functionality requires credentialed access through a Google Cloud Platform account. Credentials are already available when running in a Terra notebook environment. Otherwise, credentials may be obtained with the command

gcloud auth application-default login

Usage

terra-notebook-utils exposes a Python API, as well as wrappers to execute some functionality on the CLI. The Python API is best explored with Pythons great help function. For instance, issuing the follow commands into a Python interpreter or Jupyter notebook will produce help and usage for the drs module.

import terra_notebook_utils as tnu
help(tnu.drs)

Similarly, the CLI may be explored using the typical -h argument. Try the following commands at a bash prompt.

# See the command groups available to the CLI
tnu -h

# See the commands available to the vcf group
tnu vcf -h

# Show your available billing projects
tnu profile list-billing-projects

The DRS API and CLI

terra-notebook-utils provides several methods and CLI commands useful for working with DRS resolved objects:

Python API

Copy drs object to local filesystem or bucket:

from terra_notebook_utils import drs
drs.copy("drs://my-drs-url", "gs://my-dst-bucket/my-dst-key")
drs.copy("drs://my-drs-url", "local_filepath")

CLI

Copy drs object to local or bucket:

tnu drs copy drs://my-drs-url gs://my-dst-bucket/my-dstkey
tnu drs copy drs://my-drs-url local_filepath

The VCF API and CLI

terra-notebook-utils provides some CLI commands useful for getting information about VCF files. These commands work for VCFs stored locally, in a Google Storage bucket, or at a DRS url.

Print VCF header:

tnu vcf head drs://my-vcf
tnu vcf head gs://my-vcf
tnu vcf head my.vcf.gz

Print VCF samples:

tnu vcf samples drs://my-vcf
tnu vcf samples gs://my-vcf
tnu vcf samples my.vcf.gz

Print VCF stats. This command executes quickly, and shows the length and file size of the VCF. If the VCF is compressed, the compressed size is returned.

tnu vcf stats drs://my-vcf
tnu vcf stats gs://my-vcf
tnu vcf stats my.vcf.gz

While a Python API for working with VCFs is currently available, usage is more complex. Please contact the maintainer for more information.

Tests

To run tests,

1. log in with your Google credentials using gcloud auth application-default login,
2. install requirements with pip install -r requirements-dev.txt,
3. run make test in the package root.

Links

Project home page GitHub
Package distribution PyPI

Bugs

Please report bugs, issues, feature requests, etc. on GitHub.