python中运行js代码 js2py

python中运行js代码 js2py

 安装

pip install js2py

js2py的简单用法

import js2py

js = """
function add(a, b) {
    return a + b
}
"""
add = js2py.eval_js(js)
r = add(1, 2) + 3
print(r)

>>>6

进阶用法

js = """
var a = 10; 
function f(x) {
    return x*x
};
"""
context = js2py.EvalJs()
context.execute(js)

print(context.a)    # 获取值   10
print(context.f('9', 0,))   # 获取函数并执行   81

print(context.f.toString()) # 获取函数  function f(x) { [python code] }
print(context.f.constructor)   # 获取函数   'function Function() { [python code] }'

# 定制属性
context.foo = [1,2,3]
context.foo.push(4)
print(context.foo.to_list())    # [1, 2, 3, 4]

运行结果

6
10
81
function f(x) { [python code] }
'function Function() { [python code] }'
[1, 2, 3, 4]

数据类型转换标

Boolean -> bool
String -> unicode
Number -> float (or int/long if whole number)
undefined -> None
null -> None
OTHER -> JsObjectWrapper

JsObjectWrapper支持：getitem，getattr，setitem，setattr，repr和
call。此外，如果要将其
转换为内置python类型，它具有to _list和to _dict方法 。

js = js2py.eval_js('d={a: 1, b: 2}')
print(js)   # {'a': 1, 'b': 2}

print(type(js)) # <class 'js2py.base.JsObjectWrapper'>  #该类型为字典的存储

print(js.a) # 1 # 取值方法

print(js['a']) # 1  # 取值方法

js.b = 20   # 修改属性方法
print(js)   # {'a': 1, 'b': 20}
js ['c'] = 30   # 设置属性方法
print(js)   # {'a': 1, 'b': 20, 'c': 30}
print(js.to_dict()) #{'a': 1, 'b': 20, 'c': 30} # 该方法转化为字典方法

print(js2py.translate_js('var $ = 5'))
# from js2py.pyjs import *
# # setting scope
# var = Scope( JS_BUILTINS )
# set_global_object(var)
#
# # Code follows:
# var.registers(['$'])
# var.put('$', Js(5.0))

最后，Js2Py还支持从中导入任何Python代码的JavaScript
使用'pyimport'语句：

x = """
pyimport requests;
var result = requests.get("https://www.baidu.com/");

console.log(result.text.length)
"""
print(js2py.eval_js(x))

调用示例

#!/usr/bin/env python3.6
# -*- coding:utf-8 -*-
# @Author: Irving Shi


import json
import requests
import js2py

from bs4 import BeautifulSoup

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36"
}


def get_company(key):
    res = requests.get("https://aiqicha.baidu.com/s?q=" + key, headers=headers)
    soup = BeautifulSoup(res.text, features="lxml")
    tag = soup.find_all("script")[2].decode_contents()
    context = js2py.EvalJs()
    context.execute(tag)
    res = context.window.pageData.result.resultList[0]
    return res.to_dict()


res = get_company("91360000158304717T")
for i in res.items():
    print(i)