import quaternion as, e.g., quat?

[calocedrus]

Hi, I'm currently exploring your quaternion module. This is more of a curiosity question that I have rather than an issue, likely arising from to my limited knowledge in python rather than a limitation in your module.
When I try:

import numpy as np
import quaternion as quat
myq = np.quat(0,1,0,0)

I get
AttributeError: module 'numpy' has no attribute 'quat'
but

import numpy as np
import quaternion as quaternion
myq = np.quaternion(0,1,0,0)

is fine.
Why can't I import quaternion as whatever_name_I_chose?

[moble]

There are two separate things going on here. There's the quaternion module, which you've successfully imported as quat in the first case. Then there's the np.quaternion submodule that gets inserted into numpy (under whatever name you've imported it; in this case np). You can't change the name of the submodule because you didn't directly create it; it's hard-coded in the quaternion.__init__.py file.

So you could do

import numpy as np
import quaternion as quat
myq = np.quaternion(0,1,0,0)
myq2 = quat.quaternion(0,1,0,0)

You could also do

import numpy
import quaternion as quat
myq = numpy.quaternion(0,1,0,0)
myq2 = quat.quaternion(0,1,0,0)