我是python的新手.我在我的Linux PC(Ubunutu 12.04)上安装了一个名为RYU的openflow控制器,使用:
sudo pip install ryu
我试图使用ryu-manager运行python文件,如下所示.
sudo ryu-manager simple_switch.py
Traceback (most recent call last):
File "/usr/local/bin/ryu-manager", line 19, in <module>
import gevent
ImportError: No module named gevent
然后我尝试使用以下命令安装gevent:
sudo pip install gevent
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c gevent/core.c -o build/temp.linux-x86_64-2.7/gevent/core.o
gevent/core.c:4:20: fatal error: Python.h: No such file or directory
compilation terminated.
error: command 'gcc' failed with exit status 1
这个错误的原因是什么？我尝试使用以下方法找到Python.h文件:
sudo locate Python.h
我在我的系统上找不到它.但是如果我跑:
python -V
我得到输出:
Python 2.7.3
Python.h应该在系统上吗？如果是这样,我应该安装什么来获得它？
我正在使用Ubuntu 14.04 x64,我已经按照Scrapy文档使用pip安装包:
pip install scrapy
然后我跟着示例项目的初始化并尝试执行示例spider:
scrapy crawl example
我收到此错误:
2015-02-23 10:23:42+0100 [scrapy] INFO: Scrapy 0.14.4 started (bot: example)
2015-02-23 10:23:42+0100 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, MemoryUsage, SpiderState
Traceback (most recent call last):
File "/usr/local/bin/scrapy", line 11, in <module>
sys.exit(execute())
File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 132, in execute
_run_print_help(parser, _run_command, cmd, args, opts)
File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 97, in _run_print_help
func(*a, **kw)
File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 139, in _run_command
cmd.run(args, opts) …