[Tutor] Idle - ImportError: No module named numpy

[Markos]

On 09-03-2015 21:25, Oscar Benjamin wrote:
> On 9 March 2015 at 18:09, Markos<markos at c2o.pro.br>  wrote:
>    
>> I installed numpy in Debian (6.0) with the command:
>> apt-get install python-numpy
>>
>> I just find that this package is exclusively for python 2.5 and 2.6
>>
>> The idle3 use Python 3.1.3.
>>
>> How to install numpy for Python 3 in order to use it with the idle?
>>
>> Is there any simple way?
>>      
> Hi Markos,
>
> I'm not sure about Squeeze but on this Ubuntu 14.04 system you can
> install numpy for Python 3 by typing:
>
>      $ sudo apt-get install python3-numpy
>
> The Python 3 version of the package is a relatively new addition to
> the repositories though so it may not be available in Squeeze.
>
> If there is no package then you can build numpy yourself. It's not too
> hard to do. First make sure that you have pip installed for python3.
> You can check if it's installed by typing:
>
>      $ python3 -m pip
>
> If it says
>
>      /usr/bin/python3: No module named pip
>
> then you don't have pip. You may be able to install pip with
>
>      $ sudo apt-get install python3-pip
>
> If not then you can install it by downloading the get-pip.py script from here:
>
>      https://pip.pypa.io/en/latest/installing.html
>
> Once you have that you can run it as
>
>      $ sudo python3 get-pip.py
>
> Once pip is installed you can use it to install lots of things
> including numpy. For numpy in particular though you'll need to first
> install the compilers and Python 3 header files:
>
>      $ sudo apt-get install build-essential python3-dev
>
> Now you can use pip to install numpy for python3:
>
>      $ sudo python3 -m pip install numpy
>
> This will download numpy from PyPI and then try to compile and install
> it. Compiling numpy takes a while and you will see a lot of strange
> compiler messages. If it fails then just post the very last part of
> the output here. It will probably mean that you need to install more
> compilers or something.
>
> If it succeeds then you should be able to import numpy e.g.:
>
>      $ python3
>      Python 3.4.0 (default, Apr 11 2014, 13:05:11)
>      [GCC 4.8.2] on linux
>      Type "help", "copyright", "credits" or "license" for more information.
>      >>>  import numpy
>      >>>  numpy.cos(1)
>      0.54030230586813977
>
>
> Oscar
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
>
>    

Hi.

I don't have the python3-pip in the repository, then I downloaded the 
get-pip.py from:

https://bootstrap.pypa.io/get-pip.py

But when running the command "python3 get-pip.py" appears the error 
message (end of message).

I found a message about a bug with pip at 
https://github.com/pypa/pip/issues/1093

Is it the same kind of error?

Any tip?

And another doubt.

Is there any risk of numpy module to be used by python3 to conflict with 
the numpy module that is already installed for python2.5 and python2.6?

I still don't know the structure of Python packages.

Thank you very much for your detailed explanation.

Markos


# python3 get-pip.py
Collecting pip
   Exception:
   Traceback (most recent call last):
     File "/tmp/tmpn0At3p/pip.zip/pip/basecommand.py", line 232, in main
       status = self.run(options, args)
     File "/tmp/tmpn0At3p/pip.zip/pip/commands/install.py", line 339, in run
       requirement_set.prepare_files(finder)
     File "/tmp/tmpn0At3p/pip.zip/pip/req/req_set.py", line 333, in 
prepare_files
       upgrade=self.upgrade,
     File "/tmp/tmpn0At3p/pip.zip/pip/index.py", line 305, in 
find_requirement
       page = self._get_page(main_index_url, req)
     File "/tmp/tmpn0At3p/pip.zip/pip/index.py", line 783, in _get_page
       return HTMLPage.get_page(link, req, session=self.session)
     File "/tmp/tmpn0At3p/pip.zip/pip/index.py", line 872, in get_page
       "Cache-Control": "max-age=600",
     File "/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/sessions.py", 
line 473, in get
       return self.request('GET', url, **kwargs)
     File "/tmp/tmpn0At3p/pip.zip/pip/download.py", line 365, in request
       return super(PipSession, self).request(method, url, *args, **kwargs)
     File "/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/sessions.py", 
line 461, in request
       resp = self.send(prep, **send_kwargs)
     File "/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/sessions.py", 
line 573, in send
       r = adapter.send(request, **kwargs)
     File "/tmp/tmpn0At3p/pip.zip/pip/_vendor/cachecontrol/adapter.py", 
line 43, in send
       resp = super(CacheControlAdapter, self).send(request, **kw)
     File "/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/adapters.py", 
line 370, in send
       timeout=timeout
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", 
line 518, in urlopen
       body=body, headers=headers)
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", 
line 322, in _make_request
       self._validate_conn(conn)
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", 
line 727, in _validate_conn
       conn.connect()
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/connection.py", 
line 238, in connect
       ssl_version=resolved_ssl_version)
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py", 
line 254, in ssl_wrap_socket
       return context.wrap_socket(sock)
     File 
"/tmp/tmpn0At3p/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py", 
line 80, in wrap_socket
       return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
   TypeError: wrap_socket() got an unexpected keyword argument 'ciphers'