GRE Walkthrough notebook seems to have multiple bugs, with v1.4.0 at least

[curtcorum]

Describe the bug
GRE Walkthrough notebook seems to have multiple bugs, with v1.4.0 at least

To Reproduce
gre_walkthrough.ipynb on colab

Expected behavior
Halts on:

from pypulseq.make_trap_pulse import make_trapezoid

when above fixed halts next on:

rf, gz, gzr = make_sinc_pulse(flip_angle=alpha * math.pi / 180, duration=4e-3, slice_thickness=slice_thickness, apodization=0.5, time_bw_product=4, system=sys)

did not go farther...

Screenshots

Desktop (please complete the following information):
gre_walkthrough.ipynb on colab

• OS: see colab
• OS Version: see colab
• pypulseq version: 1.4.0

Additional context
Have not tried locally, some other examples seem to run ok on colab.

[btasdelen]

Thanks for catching this. It looks like this example is based on PyPulseq 1.3.0. If you have a working version, feel free to submit a PR. Otherwise, I can have a crack at it when I have the time.

[btasdelen]

Solved in #121.