PyEvalJS

PyEvalJS is a python wrapper for Microsoft Chakra engine, it act as a bridge between the Python and JavaScript objects, and with this module you can easily run JavaScript Code in Python without having to install nodejs.

Installation

pip install PyEvalJS

Usage

Execute a script

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.eval("'red yellow blue'.split(' ')")
['red', 'yellow', 'blue']

Call a function

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.compile("""
...     function add(x, y) {
...         return x + y;
...     }
... """)
>>> runtime.call("add",1,2)
3

or just put args into the script

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.eval("""
...     function add2(num) {
...         return num+2;
...     } add2(8);""")
10

or by passing parameters

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.set_variable("a",8)
True
>>> runtime.eval("""
...     function add2(num) {
...         return num+2;
...     } add2(a);""")
10

Passing parameters

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.set_variable("name", ['Jim','Bob','Tour'])
True
>>> runtime.get_variable("name")
['Jim', 'Bob', 'Tour']

Use a JavaScript module

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.require("./js/crypto-js.js")  #import CryptoJS
>>> runtime.compile("""
...     function encryptByDESModeCBC(key,message) {
...         var keyHex = CryptoJS.enc.Utf8.parse(key);
...         var ivHex = CryptoJS.enc.Utf8.parse(key);
...         encrypted = CryptoJS.DES.encrypt(message, keyHex, {
...                 iv:ivHex,
...                 mode: CryptoJS.mode.CBC,
...                 padding:CryptoJS.pad.Pkcs7
...             }
...         );
...         return encrypted.ciphertext.toString();
...     }""")
>>> runtime.call("encryptByDESModeCBC",'1234','this is a test')
'94b7b0cc2b71165ea067868f595fc03a'

Call the same function for each item in the list

>>> from PyEvalJS import Runtime
>>> runtime = Runtime()
>>> runtime.compile("""
...     function add2(num) {
...         return num+2;
... }""")
>>> runtime.call_for_each("add2",[1,2,4,6,5])
[3, 4, 6, 8, 7]

Supports

• Python2 >= 2.7
• Python3 >= 3.4

Platform

• macOS x64
• Linux x64
• Windows x86/x64 (tested on Windows 10 x64, Python 3.7)

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

Licence

Code released under the MIT license