python3安装web.py

今天准备测试代理池IPProxyPool获取到ip的质量，在安装web.py的时候遇到了些问题，在此记录一下。

1.安装资料

web.py官网：http://webpy.org/

web.py的github地址：https://github.com/webpy/webpy/

2.安装

方法1：(推荐)

pip install web.py==0.40-dev1

方法2：

注意：这个是使用linux软连接方式

git clone git://github.com/webpy/webpy.git
ln -s `pwd`/webpy/web .

方法3(从源码处安装)：

git clone https://github.com/webpy/webpy.git
cd webpy
python setup.py install
pip list

3.问题

3.1.python2与python3问题

pip install web.py

上面安装命令只支持python2，官网上已经说明过。这样安装会报错：

ERROR: Command errored out with exit status :
     command: 'e:\program\python\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\peng\\AppData\\Local\\Temp\\pip-install-ubdky_a3\\web.py\\setup.py'"'"'; __file__='"'"'C:\\Users\\peng\\AppData\\Local\\Temp\\pip-install-ubdky_a3\\web.py\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base pip-egg-info
         cwd: C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\
    Complete output ( lines):
    Traceback (most recent call last):
      File "<string>", line , in <module>
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\setup.py", line , in <module>
        from web import __version__
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\web\__init__.py", line , in <module>
        import utils, db, net, wsgi, http, webapi, httpserver, debugerror
    ModuleNotFoundError: No module named 'utils'
    ----------------------------------------
ERROR: Command errored out with exit status : python setup.py egg_info Check the logs for full command output.

主要是这个错误：

Traceback (most recent call last):
      File "<string>", line , in <module>
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\setup.py", line , in <module>
        from web import __version__
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\web\__init__.py", line , in <module>
        import utils, db, net, wsgi, http, webapi, httpserver, debugerror
    ModuleNotFoundError: No module named 'utils'

原因是，除了0.40-dev1版本支持python3外其他版本都不支持（测试过webpy-0.39）

github上的版本：https://github.com/webpy/webpy/tags

3.2.测试hello world出错

官网例子：

import web

urls = (
    '/(.*)', 'hello'
)
app = web.application(urls, globals())

class hello:
    def GET(self, name):
        if not name:
            name = 'World'
        return 'Hello, ' + name + '!'

if __name__ == "__main__":
    app.run()

错误：

Traceback (most recent call last):
  File "E:\Program\python\lib\site-packages\web\utils.py", line , in take
    yield next(seq)
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File ".\test_web.py", line , in <module>
    app = web.application(urls, globals())
  File "E:\Program\python\lib\site-packages\web\application.py", line , in __init__
    self.init_mapping(mapping)
  File "E:\Program\python\lib\site-packages\web\application.py", line , in init_mapping
    self.mapping = list(utils.group(mapping, ))
  File "E:\Program\python\lib\site-packages\web\utils.py", line , in group
    x = list(take(seq, size))
RuntimeError: generator raised StopIteration

解决方法：

修改Lib\site-packages\web 下的utils.py文件，在526行

源码：

def take(seq, n):
        for i in range(n):
            yield next(seq)

修改后：

def take(seq, n):
        for i in range(n):
            try:
                yield next(seq)
            except StopIteration:
                return

运行：

访问http://localhost:8080/