PyChakra

PyChakra is a Python binding to Microsoft Chakra(v1.11.16) Javascript engine.

Chakra is a modern JavaScript engine for Microsoft Edge, it support 96% ES6 feature, Complete info see https://kangax.github.io/compat-table/es6/

Installation

pip install PyChakra

Usage

from PyChakra import Runtime

# create runtime instance
runtime = Runtime()

# eval JavaScript code
runtime.eval("(() => 2)();") # (True, 2)
runtime.eval("(() => a)();") # (False, "ReferenceError: 'a' is not defined")

# set or get variable
runtime.set_variable("foo", "'bar'") # True
runtime.get_variable("foo") # 'bar'

API

eval(js_string)

Eval JavaScript code string.

Parameters:

• js_string: str: JavaScript code string

Returns: (is_successful: bool, result: any)

• is_successfully: indicates whether JavaScript is running successfully.
• result:
  • if s is True, result is the JavaScript running return value.
  • if is_successfully is False and result is string, result is the JavaScript running exception.
  • if is_successfully is False and result is number, result is the chakra internal error code. see(github)

set_variable(variable_name: str, variable_value: any)

Set variable in global scope.

Parameters:

• variable_name: str: JavaScript variable name.
• variable_value: str: JavaScript variable value in Python str.

Returns: same as eval

get_variable(variable_name: str)

Get variable in global scope.

Parameters:

• variable_name: str: JavaScript variable name.

Returns: variable_value: str

• if returns value is None, it indicates there is no variable_name in the global scope.

Supports

• Python2 >= 2.7
• Python3 >= 3.4

Platform

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