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File System

Some internal Pyodide file system methods are exposed.

For more info, see the API reference docs.

import { usePython } from 'react-py'

function Codeblock() {
  const { readFile, writeFile, mkdir, rmdir ... } = usePython()

  function read() {
    const file = readFile('/hello.txt')
    console.log(file)
  }

  function write() {
    const data = 'hello world!'
    writeFile('/hello.txt', data)
  }

  function createDir() {
    mkdir('lib')
  }

  function deleteDir() {
    rmdir('cruft')
  }

  ...
}

You can also use Python to read and write files:

Setting up environment...
with open("hello.txt", "w") as f:
f.write('hello world!')
with open('hello.txt') as f:
contents = f.read()
print(contents)
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note

Files are not shared between instances, each usage of the usePython hook has an independent file system. Files are also not persisted on page reload.

Using multiple files​

You can use Custom Modules to make use of multiple files:

Setting up environment...
from numbers import multiply
from strings import reverse_string
numbers = [1, 2, 3, 4, 5]
result = multiply(numbers)
print("Result of multiplication:", result)
string_to_reverse = "Hello, World!"
reversed_string = reverse_string(string_to_reverse)
print("Reversed string:", reversed_string)
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You can find the source code for this example here.