glm 
A fast GridLAB-D to JSON (and back) parser.
- Fast GLM to JSON converter.
- Supports nested objects, schedules, definitions, directives, modules, includes and clock objects
- Fast JSON to GLM converter.
- Native support for Python, returns nested dictionaries.
- Descriptive error messages when unable to parse a GridLAB-D model file.
- Tested on all examples in the GridLAB-D source repository.
Install
Go to the latest releases page for the Python or the CLI for various operating systems.
Python
You can pip install the package from PyPI or using the wheel (files with extension .whl) after downloading it or directly from the URL from the releases page.
The following installs the latest glm package for Windows, MacOSX or Linux from PyPI. This will work for Python2 or Python3.
pip install glm
This also installs the glm2json and json2glm cli utilities.
Documentation
You can use this from the command line as follows:
Usage:
glm2json [required&optional-params]
Convert from glm/json to json/glm
Options(opt-arg sep :|=|spc):
-h, --help write this help to stdout
--version bool false write version to stdout
-p=, --pathToFile= string REQUIRED set pathToFile
--pretty bool false set pretty
./glm2json --path-to-file ./tests/data/4node.glm --pretty  ✔  10397  18:20:47
{
"clock": {
"timestamp": "2000-01-01 0:00:00",
"timezone": "EST+5EDT"
},
"includes": [],
"objects": [
{
"name": "overhead_line_conductor:100",
"attributes": {
"name": "PhaseCond",
"geometric_mean_radius": "0.0244 ft",
"resistance": "0.306"
},
"children": []
},
{
"name": "overhead_line_conductor:101",
"attributes": {
"name": "NeutralCond",
"geometric_mean_radius": "0.00814 ft",
"resistance": "0.592"
},
"children": []
},
{
"name": "line_spacing:200",
"attributes": {
"name": "LineSpacing",
"distance_AB": "2.5",
"distance_BC": "4.5",
"distance_AC": "7.0",
"distance_AN": "5.656",
"distance_BN": "4.272",
"distance_CN": "5.0"
},
"children": []
},
{
"name": "line_configuration:1",
"attributes": {
"name": "LineConf",
"conductor_A": "PhaseCond",
"conductor_B": "PhaseCond",
"conductor_C": "PhaseCond",
"conductor_N": "NeutralCond",
"spacing": "LineSpacing"
},
"children": []
},
{
"name": "overhead_line",
"attributes": {
"name": "Line1",
"phases": "ABCN",
"from": "Node1",
"to": "Node2",
"length": "2000 ft",
"configuration": "LineConf",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "overhead_line",
"attributes": {
"name": "Line2",
"phases": "ABCN",
"from": "Node3",
"to": "Node4",
"length": "2500 ft",
"configuration": "LineConf",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "node",
"attributes": {
"name": "Node1",
"phases": "ABCN",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "node",
"attributes": {
"name": "Node2",
"phases": "ABCN",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "node",
"attributes": {
"name": "Node3",
"phases": "ABCN",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "node",
"attributes": {
"name": "Node4",
"phases": "ABCN",
"nominal_voltage": "124.0"
},
"children": []
},
{
"name": "tape.recorder",
"attributes": {
"interval": "4.0",
"parent": "network_node2",
"limit": "21600",
"file": "./csv_output/network_node2.csv",
"property": "measured_real_power, measured_real_energy, voltage_A, voltage_B, voltage_C"
},
"children": []
}
],
"modules": [
{
"name": "powerflow",
"attributes": {}
},
{
"name": "tape",
"attributes": {}
}
],
"directives": [],
"definitions": [],
"schedules": []
}
Issues
Feel free to open an issue if something is not working as expected.
Developer Guide
- Install Nim
- Run
nimble install -yto generate binaries
If you want to install the latest version from GitHub, you can use the following commands. The GitHub release is identical to that on PyPI.
Windows
export VERSION=$(curl -s "https://github.com/NREL/glm/releases/latest" | grep -o 'tag/[v.0-9]*' | awk -F/ '{print $2}')
pip install https://github.com/NREL/glm/releases/download/$VERSION/glm-${VERSION#"v"}-py2.py3-none-win_amd64.whl
OSX
export VERSION=$(curl -s "https://github.com/NREL/glm/releases/latest" | grep -o 'tag/[v.0-9]*' | awk -F/ '{print $2}')
pip install https://github.com/NREL/glm/releases/download/$VERSION/glm-${VERSION#"v"}-py2.py3-none-macosx_10_7_x86_64.whl
Linux
export VERSION=$(curl -s "https://github.com/NREL/glm/releases/latest" | grep -o 'tag/[v.0-9]*' | awk -F/ '{print $2}')
pip install https://github.com/NREL/glm/releases/download/$VERSION/glm-${VERSION#"v"}-py2.py3-none-manylinux1_x86_64.whl
