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JS bindings to polars

License: MIT License

TypeScript 6.70% Python 0.54% Rust 92.76%

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universalmind303 kylebarron shabbirhasan1

js-polars's Issues

Readme example doesn't work

node -v

v16.14.0

yarn add @pola-rs/browser

package.json

{
  "dependencies": {
    "@pola-rs/browser": "^0.0.1-alpha"
  },
  "type": "module",
  "scripts": {
    "start": "node index.js"
  }
}

index.js

import * as pl from "@pola-rs/browser"
const filepath = "https://raw.githubusercontent.com/pola-rs/polars/master/examples/datasets/foods2.csv"

let df = await pl.read_csv(filepath)

let lf = df.lazy();
df = await lf.collect()

console.table(df.head(10).to_records());

yarn start

node:internal/errors:464
    ErrorCaptureStackTrace(err);
    ^

Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'C:\PolarsTest\node_modules\@pola-rs\browser\' imported from C:\PolarsTest\index.js
←[90m    at new NodeError (node:internal/errors:371:5)←[39m
←[90m    at legacyMainResolve (node:internal/modules/esm/resolve:336:9)←[39m
←[90m    at packageResolve (node:internal/modules/esm/resolve:917:14)←[39m
←[90m    at moduleResolve (node:internal/modules/esm/resolve:976:18)←[39m
←[90m    at defaultResolve (node:internal/modules/esm/resolve:1078:11)←[39m
←[90m    at ESMLoader.resolve (node:internal/modules/esm/loader:530:30)←[39m
←[90m    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:251:18)←[39m
←[90m    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:79:40)←[39m
←[90m    at link (node:internal/modules/esm/module_job:78:36)←[39m {
  code: ←[32m'ERR_MODULE_NOT_FOUND'←[39m

failed to load module script

@universalmind303 I fail to import browser side, via a script invoked in index.html.

Steps to reproduce:

mkdir jspolars
cd jspolars

$ yarn add @pola-rs/browser
yarn add v1.22.21
info No lockfile found.
(node:63701) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 🔨  Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ @pola-rs/[email protected]
info All dependencies
└─ @pola-rs/[email protected]
✨  Done in 1.78s.

./index.html

<!DOCTYPE html>
<html lang="en">
  <head>
  <meta charset="UTF-8">    
  <title>pola-rs/browser</title>    
</head>

<body>
  <div id="output"></div>
  <script  type="module" src="./script.js"></script>
</body>
</html>

./script.js

import * as pl from "./node_modules/@pola-rs/browser"
let  filepath = "https://raw.githubusercontent.com/pola-rs/polars/master/examples/datasets/foods2.csv"
let response = await fetch(filepath);
let responseTEXT = await response.text();
let df = await pl.readCSV(responseTEXT);
console.table(df)

./start-http-server-8119.sh

python -m http.server --bind 127.0.0.1 8119

Start the server:

.  start-http-server-8119.sh 
Serving HTTP on 127.0.0.1 port 8119 (http://127.0.0.1:8119/) ...
127.0.0.1 - - [07/Jan/2024 08:06:35] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:06:35] "GET /script.js HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:06:35] "GET /node_modules/@pola-rs/browser/ HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:06:35] "GET /favicon.ico HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:09:01] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:09:01] "GET /script.js HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:09:01] "GET /node_modules/@pola-rs/browser HTTP/1.1" 301 -
127.0.0.1 - - [07/Jan/2024 08:09:01] "GET /node_modules/@pola-rs/browser/ HTTP/1.1" 200 -
127.0.0.1 - - [07/Jan/2024 08:09:01] "GET /favicon.ico HTTP/1.1" 200 -

Using import * as pl from "@pola-rs/browser" fails:
console.log:
```
localhost/:1 Uncaught TypeError: Failed to resolve module specifier "@pola-rs/browser".


Using `import * from "./node_modules/@pola-rs/browser"` fails:
console.log:

browser/:1 Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec.

This just gives the directory listing.   

No joy importing browser/browser.js either.

How should I do this?   I'd like to integrate polars into a browser-side library suite.  It does not have to be perfect at this juncture, for p.o.c.,  but hoping of course for further development.

thanks, George

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