add poetry installation README, pyproject.toml and poetry.lock for easier installation.

README.md

@@ -32,6 +32,42 @@ pip install torch-tools
 pip install visdom
 python setup.py install
 ```
+# Install using poetry
+
+## prerequisite
+install python 3.7, poetry and ffmpeg
+
+```
+# install poetry (mac, linux)
+curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python -
+
+# install ffmpeg
+
+(macos)
+brew install ffmpeg
+
+(linux)
+sudo apt install ffmpeg
+
+or use conda
+conda install -y -c conda-forge ffmpeg
+```
+
+## Install python packages
+
+```
+# install all python dependencies
+poetry install
+
+# install pydiffvg
+poetry run python setup.py install
+```
+
+Now to run the apps, just add `poetry run` before each of the commands below, e.g.
+
+```
+poetry run python single_circle.py
+```
 
 # Building in debug mode
 

pyproject.toml

@@ -0,0 +1,26 @@
+[tool.poetry]
+name = "diffvg"
+version = "0.1.0"
+description = ""
+authors = ["Marco Lee <marco@goodnotesapp.com>"]
+
+[tool.poetry.dependencies]
+python = "=3.8"
+pygame = "^2.0.1"
+
+[tool.poetry.dev-dependencies]
+torch = "^1.8.1"
+torchvision = "^0.9.1"
+numpy = "^1.20.2"
+scikit-image = "^0.18.1"
+svgwrite = "^1.4.1"
+svgpathtools = "^1.4.1"
+cssutils = "^2.2.0"
+numba = "^0.53.1"
+torch-tools = "^0.1.5"
+visdom = "^0.1.8"
+cmake = "^3.18.4"
+
+[build-system]
+requires = ["poetry-core>=1.0.0a5"]
+build-backend = "poetry.core.masonry.api"