pnwtools 25.9.10

Tools for working with bioacoustics data

pnwtools

pnwtools is a collection of software tools intended to be useful for researchers and technicians with the USDA Forest Service Pacific Northwest Research Station, specifically those involved in passive acoustic monitoring of Northern spotted owls and other forest wildlife. These tools may also be useful to others doing bioacoustics work, but please note that they are mostly designed for use within the USFS spotted owl monitoring program and will reflect its various idiosyncrasies.

pnwtools is structured as a Python package for ease of distribution via the Python Package Index. The package contains a Python module called pnwtools which exports various functions, but the package is not really intended to provide a complete functional API. The main purpose of the package is to provide a collection of useful scripts that can be run as standalone command- line tools. See the Scripts section below for notes on the available scripts and how to use them.

This package is intended to be a living resource and will be updated periodically with new scripts as well as bug fixes and improvements to existing scripts. If there are tools or features you would like to see added, or if something is not working correctly, please email Zack via zjruff at gmail dot com.

Installation

pnwtools is compatible with Python versions 3.8+ and can be installed from the Python Package Index (PyPI) using pip like so:

python -m pip install pnwtools

Note that there is an unrelated package called pwntools which provides tools for Capture The Flag-style cybersecurity competitions. The similar names make it very easy to install this other package by mistake, so think "PNW tools" and use care when typing, or simply copy and paste the above command into your shell program.

You can update pnwtools to the latest version at any time like so:

python -m pip install --upgrade pnwtools

This will search PyPI for a version of pnwtools that's newer than the one you have installed; if there is a newer version available, pip will install it for you.

Scripts

These scripts are provided as standalone command-line tools that can be run from a shell program such as Windows PowerShell, Bash, the Anaconda Prompt, Konsole, etc. etc. If you installed pnwtools in a conda environment, you will need to activate the environment before running these scripts.

rename_files

This script will standardize the names of .wav files within the target directory tree. The standardized name of each file will consist of a prefix and a timestamp. The prefix will be generated based on the two lowest-level path components of the directory containing the file, i.e. the file's parent directory and that directory's parent directory. If the filename already contains a timestamp in the expected format (YYYYMMDD_HHMMSS, as used by Wildlife Acoustics ARUs), it will be preserved. If not, the timestamp will be generated from each .wav file's last modification time.

Run this script like so:

rename_files D:\Path\to\target_dir

If you need to undo the changes, you can just run the script again on the same target directory. The script will detect the log file created by the initial operation and use it as a guide to reverse any filename changes that were made.

station_info

This script will create a table summarizing the .wav files in the target directory by recording station. The summary will be written to a CSV file listing the station ID, number of valid .wav files, first and last recording dates, and the serial number of the ARU (or "NA" if the serial number could not be read).

Run this script like so:

station_info D:\Path\to\target_dir

check_tags

This script will summarize the ID tags that have been applied to a review file. The review file must have columns named FOLDER, IN_FILE, and MANUAL_ID and any tags to be counted must be present in the MANUAL_ID column. The output will include a summary of the review file, including when it was last saved, the total number of lines, the number of tagged lines, and the number of unique tags used. The script will print a summary of the tags used and how many times each tag occurs in each FOLDER (e.g. recording station).

Run this script like so:

check_tags D:\Path\to\Site_Name\Site_Name_review_kscope.csv

make_wav_review_file

This script will create a CSV file listing all .wav files in the target directory, with each audio file split into short segments for manual review. There are two optional arguments, clip_length and interval. clip_length indicates the desired length (in seconds) of the segments into which each audio file will be divided. interval indicates the interval (also in seconds) between the start of one segment and the start of the next segment. By default these are both 12 s, meaning the audio will be divided into non-overlapping 12-s segments.

To run this script with the default behavior, run

make_wav_review_file D:\Path\to\target_dir

To run the script using different values for clip_length and interval, run e.g.

make_wav_review_file D:\Path\to\target_dir 12 8

recover_filenames

This script is intended for restoring the names of .wav files that have been recovered from a corrupted SD card and been renamed File001.wav, File002.wav, etc. If you know where the files are from, you can supply a prefix which will be applied to each filename; if you do not provide a prefix, the script will use the ARU serial number.

Run this script like so:

recover_filenames D:\Path\to\target_dir

To provide a prefix for any files that are recovered, run e.g.

recover_filenames D:\Path\to\target_dir COA_23459-B