Labelmaker

Make printable QR code labels for samples using basic information about a project.

Installation

Labelmaker has been tested on macOS and Linux. It requires the following software:

• Conda
• TeX Live
• Labelmaker (this repository)

Conda

If you don't have Conda installed on your machine, install Miniconda for your operating system (Python 3.7+ version).

Create a conda environment called labels where you will install the package qrcode:

conda create -n labels pandas click python=3
source activate labels
pip install qrcode[pil]

TeX Live

Tex Live provides a comprehensive TeX system with binaries for macOS, Linux, and Windows; you can download it here. We will use lualatex. A TeX installation is not absolutely required, but it is required to render a label sheet (PDF) from the individual label image files (PNG).

Labelmaker

Clone the Labelmaker repository to your computer:

git clone https://github.com/aomlomics/labelmaker
cd labelmaker

Execution

Make a sheet of labels in three easy steps:

1. Generate the labels as PNG files.
2. Generate a composite sheet of labels as a PDF file.
3. Print!

Step 1: Generate individual labels (PNG)

Run the command generate_labels.py with the required parameters. To learn more about each parameter, run ./generate_labels.py --help. Two options for sample names are available:

Option 1: Provide a list of samples

If a list of sample names is provided, those sample names are used. The sample list should be provided as a text file with one sample name per line (no spaces). If the number of replicates N is greater than 1 (default), replicate labels are produced from 1 to N.

./generate_labels.py \
  --project Project1 \
  --contact MySurname \
  --sample_type DNA_0.2um \
  --date 180929 \
  --sample_list sample_list.txt \
  --num_replicates 1

Option 2: Number sequentially

If no list of sample names is provided, samples are named from 1 to M, where M is the specified number of samples. If the number of replicates N is greater than 1 (default), replicate labels are produced from 1 to N.

./generate_labels.py \
  --project Project2 \
  --contact MySurname \
  --sample_type DNA_0.2um \
  --date 180929 \
  --num_samples 5 \
  --num_replicates 2

Step 2: Generate label sheet (PDF)

Labelmaker produces letter size PDF files intended to be printed on Cryo-Babies label sheets, part number LCRY-1700 (Diversified Biotech). These are 1.28-inch x 0.5-inch labels in a grid of 5 x 17 labels.¹

Label sheets are generated from TeX files using lualatex. If the number of samples including replicates exceeds 85 (the number of labels per sheet), multiple TeX files will be produced and should be converted to PDF.

Run lualatex from the directory containing the PNG files and TeX file using the commands below.

cd /PATH/TO/labelmaker/labels_Project1
lualatex labelsheet1_Project1_LCRY1700.tex

cd /PATH/TO/labelmaker/labels_Project2
lualatex labelsheet1_Project2_LCRY1700.tex

Step 3: Print

Open the resulting PDF file (e.g., labelsheet1_Project1_LCRY1700.pdf) and print on a sheet of Cryo-Babies LCRY-1700 labels.

Example:

---

¹ Although the physical labels are 1.28 x 0.5 inches, the Python code and TeX code are calibrated for labels with size 1.05 x 0.5 inches or an aspect ratio of 2.1:1 (width:height). By default, generate_labels.py will produce PNG files with dimensions 1.05 x 0.5 inches. The user should not change these defaults if they intend to use the commands below to generate label sheets.

Disclaimer

This repository is a scientific product and is not official communication of the National Oceanic and Atmospheric Administration, or the United States Department of Commerce. All NOAA GitHub project code is provided on an ‘as is’ basis and the user assumes responsibility for its use. Any claims against the Department of Commerce or Department of Commerce bureaus stemming from the use of this GitHub project will be governed by all applicable Federal law. Any reference to specific commercial products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply their endorsement, recommendation or favoring by the Department of Commerce. The Department of Commerce seal and logo, or the seal and logo of a DOC bureau, shall not be used in any manner to imply endorsement of any commercial product or activity by DOC or the United States Government.