python3安裝web.py

今天准備測試代理池IPProxyPool獲取到ip的質量，在安裝web.py的時候遇到了些問題，在此記錄一下。

1.安裝資料

web.py官網：http://webpy.org/

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

2.安裝

方法1：(推薦)

pip install web.py==0.40-dev1

方法2：

注意：這個是使用linux軟連接方式

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

方法3(從源碼處安裝)：

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

3.問題

3.1.python2與python3問題

pip install web.py

 上面安裝命令只支持python2，官網上已經說明過。這樣安裝會報錯：

ERROR: Command errored out with exit status 1:
     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 (7 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\setup.py", line 6, in <module>
        from web import __version__
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\web\__init__.py", line 14, in <module>
        import utils, db, net, wsgi, http, webapi, httpserver, debugerror
    ModuleNotFoundError: No module named 'utils'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

 主要是這個錯誤：

Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\setup.py", line 6, in <module>
        from web import __version__
      File "C:\Users\peng\AppData\Local\Temp\pip-install-ubdky_a3\web.py\web\__init__.py", line 14, 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（測試過webpy-0.39）

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

3.2.測試hello world出錯

官網例子：

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()

錯誤：

Traceback (most recent call last):
  File "E:\Program\python\lib\site-packages\web\utils.py", line 526, 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 6, in <module>
    app = web.application(urls, globals())
  File "E:\Program\python\lib\site-packages\web\application.py", line 62, in __init__
    self.init_mapping(mapping)
  File "E:\Program\python\lib\site-packages\web\application.py", line 130, in init_mapping
    self.mapping = list(utils.group(mapping, 2))
  File "E:\Program\python\lib\site-packages\web\utils.py", line 531, in group
    x = list(take(seq, size))
RuntimeError: generator raised StopIteration

解決方法：

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

源碼：

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

運行：

訪問http://localhost:8080/