Flask uWSGI - ImportError：没有名为请求的模块

Question

我正在使用 Python 2.7.11 :: Anaconda 2.4.0 (x86_64)

我正在努力学习uWSGI。我可以从本教程开始获得“Hello World”PythonuWSGI 应用程序：http://uwsgi-docs.readthedocs.io/en/latest/WSGIquickstart.html#the-first-wsgi-application

现在我想制作一个“Hello World”Flask 应用程序。当我跑步时：

uwsgi --socket 127.0.0.1:3031 --wsgi-file app.py --callable app --processes 4 --threads 2 --stats 127.0.0.1:9191

我收到此错误：

  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/werkzeug/http.py", line 28, in <module>
    from urllib.request import parse_http_list as _parse_list_header
ImportError: No module named request

我尝试了pip install -U Werkzeug，但没有奏效。 Werkzeug 文档说：

“Werkzeug 至少需要 Python 2.6 才能正常工作。如果您确实需要支持旧版本，您可以下载旧版本的 Werkzeug，但我们强烈建议不要这样做。Werkzeug 目前对 Python 3 有实验性支持。 "

我使用的是 Python 2.7.11，所以我不确定为什么 werkzeug 尝试使用 urllib.request 而不是 urllib2。

---

这是完整的堆栈跟踪：

*** Starting uWSGI 2.0.13.1 (64bit) on [Sun Jun  5 17:31:43 2016] ***
compiled with version: 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.31) on 05 June 2016 16:36:34
os: Darwin-15.3.0 Darwin Kernel Version 15.3.0: Thu Dec 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64
nodename: Johns-MacBook-Pro.local
machine: x86_64
clock source: unix
detected number of CPU cores: 8
current working directory: /Users/JohnsMacBook/Dropbox/DEV/PyDev/flask-nginx
detected binary path: /Users/JohnsMacBook/anaconda/bin/uwsgi
!!! no internal routing support, rebuild with pcre support !!!
your processes number limit is 709
your memory page size is 4096 bytes
detected max file descriptor number: 256
lock engine: OSX spinlocks
thunder lock: disabled (you can enable it with --thunder-lock)
uwsgi socket 0 bound to TCP address 127.0.0.1:3031 fd 3
Python version: 2.7.10 (default, Oct 23 2015, 18:05:06)  [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)]
Python main interpreter initialized at 0x7f8531c09740
python threads support enabled
your server socket listen backlog is limited to 100 connections
your mercy for graceful operations on workers is 60 seconds
mapped 415200 bytes (405 KB) for 8 cores
*** Operational MODE: preforking+threaded ***
Traceback (most recent call last):
  File "app.py", line 1, in <module>
    from flask import Flask
  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/flask/__init__.py", line 17, in <module>
    from werkzeug.exceptions import abort
  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/werkzeug/__init__.py", line 154, in <module>
    __import__('werkzeug.exceptions')
  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/werkzeug/exceptions.py", line 71, in <module>
    from werkzeug.wrappers import Response
  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/werkzeug/wrappers.py", line 26, in <module>
    from werkzeug.http import HTTP_STATUS_CODES, \
  File "/Users/JohnsMacBook/anaconda/lib/python2.7/site-packages/werkzeug/http.py", line 28, in <module>
    from urllib.request import parse_http_list as _parse_list_header
ImportError: No module named request
unable to load app 0 (mountpoint='') (callable not found or import error)
*** no app loaded. going in full dynamic mode ***
*** uWSGI is running in multiple interpreter mode ***
spawned uWSGI master process (pid: 9870)
spawned uWSGI worker 1 (pid: 9871, cores: 2)
spawned uWSGI worker 2 (pid: 9872, cores: 2)
spawned uWSGI worker 3 (pid: 9873, cores: 2)
spawned uWSGI worker 4 (pid: 9874, cores: 2)
*** Stats server enabled on 127.0.0.1:9191 fd: 15 ***

Answer 1

您的 python 版本似乎有问题。这是来自werkzeug.http.py 的源代码。如果你有 python 2.x，第一个 import 应该可以工作，第二个应该在 python 3 上工作。

try:
    from urllib2 import parse_http_list as _parse_list_header
except ImportError:  # pragma: no cover
    from urllib.request import parse_http_list as _parse_list_header

由于某种原因，您的 python 版本既没有 python 2 urllib2 也没有 python 3 urllib。

我对 Anaconda python 不熟悉，但会不会是安装被搞砸了？