gevent does not install properly on Ubuntu
Question:
I want to experiment with gevent, but after installing it I can’t load any gevent module.
The installation steps are:
sudo apt-get install libevent-dev
sudo pip install greenlet
sudo pip install gevent
The environment setup is Ubuntu 10.10 x86_64 GNU/Linux.
When I try to do a simple test, I get:
>>> import gevent
>>> from gevent import socket
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name socket
I suspect the installation not doing what it should, but I’m not sure what wrong.
Answers:
In Ubuntu 10.10 (and later), gevent (and dependencies) is packaged in the Ubuntu repositories.
on 11.04:
$ sudo apt-get install python-gevent
...
$ python
corey@lenovo:~$ python
Python 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53)
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gevent
>>> from gevent import socket
>>> print gevent.__version__
0.13.0
I managed to succeed to install in a “python way” using pip. Here is what I did:
I read somewhere that it seems like Ubuntu’s setup tools are broken. When you want to install a package, it reports
UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)
These commands repare the setup tools:
sudo rm -rf /usr/lib/python2.6/dist-packages/setuptools.egg-info/
sudo apt-get install --reinstall python-setuptools
After this, I tried to reinstall the two packages with pip’s –upgrade argument. It didn’t help, but I tried easy_install and it worked. I had tried it before pip, but the broken setup tools prevented it from working.
sudo easy_install greenlet
sudo easy_install gevent
There you go, with the latest version (0.13.6 as of now).
On Ubuntu 10.04 with python 2.6 I had to do:
apt-get install libevent-dev
apt-get install python-all-dev
easy_install greenlet
easy_install gevent
By the way, nice tutorial on Gevent: http://sdiehl.github.com/gevent-tutorial/
Tried what zzart posted, but still got an error on Ubuntu Trusty Tahr (14.04):
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2583, in scan_list
"Expected ',' or end-of-list in",line,"at",line[p:]
ValueError: ("Expected ',' or end-of-list in", "cffi >= 1.11.5 ; sys_platform == 'win32' and platform_python_implementation == 'CPython'", 'at', " ; sys_platform == 'win32' and platform_python_implementation == 'CPython'")
This fixed it:
sudo pip install --upgrade setuptools pip
sudo easy_install gevent
I want to experiment with gevent, but after installing it I can’t load any gevent module.
The installation steps are:
sudo apt-get install libevent-dev
sudo pip install greenlet
sudo pip install gevent
The environment setup is Ubuntu 10.10 x86_64 GNU/Linux.
When I try to do a simple test, I get:
>>> import gevent
>>> from gevent import socket
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name socket
I suspect the installation not doing what it should, but I’m not sure what wrong.
In Ubuntu 10.10 (and later), gevent (and dependencies) is packaged in the Ubuntu repositories.
on 11.04:
$ sudo apt-get install python-gevent
...
$ python
corey@lenovo:~$ python
Python 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53)
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gevent
>>> from gevent import socket
>>> print gevent.__version__
0.13.0
I managed to succeed to install in a “python way” using pip. Here is what I did:
I read somewhere that it seems like Ubuntu’s setup tools are broken. When you want to install a package, it reports
UserWarning: Unbuilt egg for setuptools [unknown version] (/usr/lib/python2.6/dist-packages)
These commands repare the setup tools:
sudo rm -rf /usr/lib/python2.6/dist-packages/setuptools.egg-info/
sudo apt-get install --reinstall python-setuptools
After this, I tried to reinstall the two packages with pip’s –upgrade argument. It didn’t help, but I tried easy_install and it worked. I had tried it before pip, but the broken setup tools prevented it from working.
sudo easy_install greenlet
sudo easy_install gevent
There you go, with the latest version (0.13.6 as of now).
On Ubuntu 10.04 with python 2.6 I had to do:
apt-get install libevent-dev apt-get install python-all-dev easy_install greenlet easy_install gevent
By the way, nice tutorial on Gevent: http://sdiehl.github.com/gevent-tutorial/
Tried what zzart posted, but still got an error on Ubuntu Trusty Tahr (14.04):
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2583, in scan_list
"Expected ',' or end-of-list in",line,"at",line[p:]
ValueError: ("Expected ',' or end-of-list in", "cffi >= 1.11.5 ; sys_platform == 'win32' and platform_python_implementation == 'CPython'", 'at', " ; sys_platform == 'win32' and platform_python_implementation == 'CPython'")
This fixed it:
sudo pip install --upgrade setuptools pip
sudo easy_install gevent