Bqplot - ipywidget error

[Dianeod]

ipywidgets issue raised:

/%python
import numpy as np

size = 100

np.random.seed(0)

x_data = np.arange(size)

y_data = np.cumsum(np.random.randn(size)  * 100.0)

from bqplot import pyplot as plt

plt.figure(title='My First Plot')

plt.plot(x_data,x_data) 

returns error

e: bad argument type for built-in operation

  [1]  /Users/dianeodonoghue/q/p.q:13: .p.e:{$["def"~3#x;$[x[3]in"<*>";ei 3;eo];"class"~5#x;$[x[5]in"*>";ei 5;eo];eo]x}
                                             ^

  [0]  p)plt.plot(x_data,x_data)
       ^

Issue arises at line plt.plot(x_data,x_data) when initalising the scales for the interactive plot in ipywidgets, so changing the input data will not fix the issue:

/%python
from bqplot import marks,scales
dict={'x':scales.LinearScale(),
 'y':scales.LinearScale()}
marks.Lines(scales=dict)
evaluation error:

e: bad argument type for built-in operation

  [1]  /Users/dianeodonoghue/q/p.q:13: .p.e:{$["def"~3#x;$[x[3]in"<*>";ei 3;eo];"class"~5#x;$[x[5]in"*>";ei 5;eo];eo]x}
                                             ^

  [0]  p)marks.Lines(scales=dict)

Also, issue does not arise when running in a q terminal, only in a jupyter notebook.