[tool.poetry] name = "example" version = "0.1.0" description = "My Hello World Example" [tool.poetry.dependencies] python = "^3.9" flask = "^1.0" requests = {version = "2.28.1", optional = true} virtualenv = [ { version = "^20.4.3,!=20.4.5,!=20.4.6" }, { version = "<20.16.6", markers = "sys_platform == 'win32' and python_version == '3.9'" }, ] [tool.poetry.dev-dependencies] [build-system] requires = ["poetry-core>=1.0.0"] build-backend = "poetry.core.masonry.api"