add python package

packages/run-wasm-python/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "run-wasm-python",
+  "version": "1.0.0",
+  "main": "./lib/cjs/index.js",
+  "module": "./lib/esm/index.js",
+  "types": "./lib/esm/index.d.ts",
+  "devDependencies": {
+    "typescript": "^4.4.3"
+  },
+  "scripts": {
+    "build": "yarn build:esm && yarn build:cjs",
+    "build:esm": "tsc",
+    "build:cjs": "tsc --module commonjs --outDir lib/cjs"
+  },
+  "dependencies": {
+    "pyodide": "^0.18.0"
+  }
+}

packages/run-wasm-python/src/index.ts

@@ -0,0 +1,37 @@
+export class PythonClient {
+  // <- [reference](https://stackoverflow.com/a/59571016/1375972)
+  // We redirect stdout to an IO string buffer so that it can be read later
+  private readonly setStdoutToOutput = `
+    import sys
+    import io
+    sys.stdout = io.StringIO()
+  `
+
+  // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+  public constructor(protected pyodide: any) {
+    pyodide.runPython(this.setStdoutToOutput)
+  }
+
+  public async run({ code }: { code: string }): Promise<string> {
+    await this.loadPackages(code)
+    const output: string = this.pyodide.runPython(code) ?? ''
+    // Prepend the value of stdout before returning
+    const stdout: string = this.pyodide.runPython('sys.stdout.getvalue()')
+    console.log(stdout + output)
+    return stdout + output
+  }
+
+  private loadPackages(code: string): Promise<any> {
+    if (typeof this.pyodide.loadPackagesFromImports === 'function') {
+      console.log('Loading Python dependencies from code')
+      return this.pyodide.loadPackagesFromImports(code)
+    }
+    return this.pyodide.loadPackage([])
+  }
+}
+
+const createPythonClient = (pyodide: string): PythonClient => {
+  return new PythonClient(pyodide)
+}
+
+export { createPythonClient }

packages/run-wasm-python/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "outDir": "lib/esm",
+    "module": "esnext",
+    "target": "es5",
+    "lib": ["es6", "dom", "es2016", "es2017"],
+    "jsx": "react",
+    "declaration": true,
+    "moduleResolution": "node",
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "esModuleInterop": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "suppressImplicitAnyIndexErrors": true,
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "lib", "example-nextjs"]
+}

packages/run-wasm-python/yarn.lock

@@ -0,0 +1,46 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+base-64@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/base-64/-/base-64-1.0.0.tgz#09d0f2084e32a3fd08c2475b973788eee6ae8f4a"
+  integrity sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==
+
+node-fetch@^2.6.1:
+  version "2.6.5"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.5.tgz#42735537d7f080a7e5f78b6c549b7146be1742fd"
+  integrity sha512-mmlIVHJEu5rnIxgEgez6b9GgWXbkZj5YZ7fx+2r94a2E+Uirsp6HsPTPlomfdHtpt/B0cdKviwkoaM6pyvUOpQ==
+  dependencies:
+    whatwg-url "^5.0.0"
+
+pyodide@^0.18.0:
+  version "0.18.1"
+  resolved "https://registry.yarnpkg.com/pyodide/-/pyodide-0.18.1.tgz#9b987de7dc30de261aeabea64052bb7ab3f1fef7"
+  integrity sha512-QgkdYXu0nkWoJ5Ein2GAgpsT6gfuRCdmiR5C3JSTUEyHnMY0MqU0hx7hpD0/ZVXNSalG7ytVQ+9SgCL2RtVcqg==
+  dependencies:
+    base-64 "^1.0.0"
+    node-fetch "^2.6.1"
+
+tr46@~0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
+  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
+
+typescript@^4.4.3:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.4.3.tgz#bdc5407caa2b109efd4f82fe130656f977a29324"
+  integrity sha512-4xfscpisVgqqDfPaJo5vkd+Qd/ItkoagnHpufr+i2QCHBsNYp+G7UAoyFl8aPtx879u38wPV65rZ8qbGZijalA==
+
+webidl-conversions@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
+  integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
+
+whatwg-url@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
+  integrity sha1-lmRU6HZUYuN2RNNib2dCzotwll0=
+  dependencies:
+    tr46 "~0.0.3"
+    webidl-conversions "^3.0.0"