MAST Contributor Tools Tutorial

MAST Contributor Tools Tutorial#

This folder contains a basic tutorial for the mast_contributor_tools package to try out the code for yourself and follow along!

Installation#

For full installation instructions, refer to the README.md file at the top-level of this repository. This package is installable via pip and can be installed using this command from the top-level folder of this repository:

pip install .

You can check if your installation was successful by starting a python session and importing the pacakge:

python
>>> import mast_contributor_tools

If this imports successfully, you are ready to go!

TUTORIAL 1: Filename Checker#

Introduction#

The filename checker is an automated way to test if your data filenames are compliant with the HLSP filenaming policies.

The Filename Checker Guide included in this repository contains full instructions on how to use the Filename Checker, so please refer to that for more detailed information! This folder contains a basic tutorial to follow-along and learn how to use the file name checker, but the Filename Checker Guide is the best resource for more general applications.

Step 1: Investigating the Tutorial data.#

The tutorial-data/ folder included in this tutorial contains several example files that you can use for testing. Take a look in that folder and familiarize yourself with its contents! This folder contains 3 different files, for a hypothetical HLSP named “mct-tutorial”.

There are three different fake fits files containing spectra for different hypothetical galaixes:

  • hlsp_mct-tutorial_jwst_nirspec_galaxy1_multi_v1_spec.fits

  • hlsp_mct-tutorial_jwst_nirspec_galaxy2_multi_v1_spec.fits

  • hlsp_mct-tutorial_jwst_nirspec_galaxy3_multi_v1_spec.fits

One catalog file containing measurements from those galaxies:

  • hlsp_mct-tutorial_jwst_nirspec_all-galaxies_multi_v1_cat.fits

And one README file describing our fake HLSP:

  • hlsp_mct-tutorial_readme.txt

Note that these files are totally empty and are just used for the purpose of this tutorial.

Step 2: Use the –help command to learn about the options#

Using the --help flag is a great option if you need to remind yourself how to run the file name checker:

mct check_filenames --help

This will print information in your terminal about the available options for this command!

Step 3: Check an Individual File Name#

Let’s check the validity of a single file name using the check_filename command. The syntax to use for this is:

mct check_filename {FILE NAME}

We will show one example which passes, and one which fails!

Step 3a: An example file name which passes#

Run this command to check the file name of one of the spectra files:

mct check_filename hlsp_mct-tutorial_jwst_nirspec_galaxy1_multi_v1_spec.fits

The code will run, print out some basic information, and let you know that this filename gets a score of:

Final Score: PASS

Step 3b: An example file name which fails#

Next, here’s an example of a file name which fails validation. HLSP filenames are required to be all-lowercase, so we can use some uppercase characters in our file name to check this:

mct check_filename HLSP_mct-tutorial_JWST_nirspec_GALAXY1_multi_v1_spec.fits

You should see that this filename will recieve:

Final Score: FAIL

But why did it fail? You can use the verbose flag (-v) to investigate and learn more information:

mct check_filename -v HLSP_mct-tutorial_JWST_nirspec_GALAXY1_multi_v1_spec.fits

This will print out a lot more information than the previous command, but specifically, it will show that this filename failed because the “HLSP”, “JWST”, and “GALAXY1” parts recieved a capitalization_score: fail.

Step 4: Checking multiple file names at once#

Checking one filename at a time is useful for troubleshooting, but a more common application would be to check multiple file names at the same time. There’s a few ways to do this: by supplying the file names directly, by providing a text file with a list of the file names, or by checking all the files in a specified directory.

Step 4a: Check multiple file names in one command#

The mct check_filename command also accepts multiple files at once for checking. Simply provide each file name in a list separated by spaces:

mct check_filename hlsp_mct-tutorial_jwst_nirspec_galaxy1_multi_v1_spec.fits hlsp_mct-tutorial_jwst_nirspec_galaxy2_multi_v1_spec.fits hlsp_mct-tutorial_jwst_nirspec_galaxy3_multi_v1_spec.fits

Step 4b: Check all file names in a directory#

The most common application of the file name checker tool would be to check all files in a specified directory.

The syntax to use for this is:

mct check_filenames {HLSP-NAME}

which will check all of the files in the current directory be default, but you can also specific a directory path with the --directory={directory-path} option.

Use this command to run the filename checker against everything in the tutorial-data/ directory:

mct check_filenames mct-tutorial --directory='tutorial-data/'

You should receieve an output message that 5 files were checked, and that all files passed!

Step 4c: Check all file names from a list#

You can also check multiple file names at once using a list in a text file. This command is useful if you want to check a large number of file names at once, but the files do not exist yet.

This command reads in a list from the tutorial_file_list.txt file, and checks each file name against the standards.

mct check_filenames mct-tutorial --from_file='tutorial_file_list.txt'

You should receieve an output message that 8 files were checked, and that all files passed!

Step 4d. Selecting or Excluding files#

If you want to test only certain file names, you can also use the --pattern option to specify a specific search pattern, or --exclude to exclude certain files.

For example, this command only checks the files matching the pattern *_spec.fits, skipping over the catalog file and the readme:

mct check_filenames mct-tutorial --directory='tutorial-data/'  --pattern='*_spec.fits'

The output message will report that this command only checked 3 files, but all 3 files pass!

This --exclude option does the opposite, checking everything except for the files matching the pattern:

mct check_filenames mct-tutorial --directory='tutorial-data/'  --exclude='*_spec.fits'

The output message will report that this command only checked 2 files, but both files passed.

Additional Resources#

Congratulations! You have completed this tutorial and now know the basic usage of the MAST Contributor’s Tools Filename Checker.

More tutorials will be added here in the future! In the meantime, check out the following links for more useful information: