Christopher Barker wrote:
> Gary Ruben wrote:
>> I just picked up a problem posted over on the numpy list. I noticed that
>> from pylab import * is importing the oldnumeric-wrapper versions of
>> zeros(), ones() and empty(), and presumably other things too, into the
>> interactive namespace. Shouldn't it be picking up the versions from
>> numpy's main namespace for interactive use?
>
> My understanding is that pylab (and Numerix) is maintaining backward
> compatibility with itself, so the oldnumeric form is the right one.
>
> Another reason NOT to EVER use "import *"
The way I tripped over this was using "ipython -pylab", which is doing
this under the hood, so it's a little uglier in this case. What would be
the effect on pylab using the newer numpy interactive namespace instead?
I wonder whether matplotlib could check whether it has been imported by
ipython interactively and import the newer namespace in this case, or
whether there's a good argument for just dropping this little backward
compatibility wart?
> Before too long, hopefully we'll only have to deal with numpy.
>
> -Chris
I'll just cross-post Fernando (ipython) Perez's solution from the numpy
list to aid anyone else who falls into this trap:
--
Until mpl drops support for the compatibility layers, you may want to
set up a simple pylab profile. In ~/.ipython make a file called
'ipythonrc-pylab' consisting of:
#######
# Load default config
include ipythonrc
# Add single-line python statements here
execute from numpy import *
########
Since pylab does a 'from .num?. import *' this will ensure that the
top-level visible functions are the current numpy ones, not the
compatibility layer ones. You then start things with:
ipython -pylab -p pylab
and you'll get:
In [1]: zeros?
Type: builtin_function_or_method
Base Class: <type 'builtin_function_or_method'>
Namespace: Interactive
Docstring:
zeros((d1,...,dn),dtype=float,order='C')
Return a new array of shape (d1,...,dn) and type typecode with all
it's entries initialized to zero.
Not ideal, but it's a little hack that will work in practice until we
finish crossing the muddy river of backwards compatibility.
Cheers,
f
--
Gary
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
