deprecate leaving 'norbs' unset

See merge request kwant/kwant!316

Closes #238

Closes #196.

use latest jupyter-sphinx and configure thebelab

Closes #306

See merge request kwant/kwant!308

add 'add_peierls_phase' utility function.

See merge request kwant/kwant!300

This function adds a Peierls phase to a Builder

this decorator will be needed in kwant/builder.py in the next
commit.

Modify tutorial to remove warnings.

In pytest v5 the behaviour of str(exc_info) changed. We now
use str(exc_info.value) as the canonical way of obtaining
the exception message.

Closes #304.

Implement Landau level discretization.

See merge request kwant/kwant!295

Tómas authored 5 years ago and Joseph Weston committed 5 years ago

Co-Authored-By: Joseph Weston <joseph@weston.cloud>

Previously when 'attach_lead' would expand a lead unit cell to deal
with greater than nearest-neighbor hoppings it would unset the
conservation law and discrete symmetries of the lead.

Closes #303.

Closes #279.

Closes #214.

Raise a TypeError when site sizes/colors are provided as arrays
and the system to plot is a kwant.Builder.

Closes #293

See merge request kwant/kwant!301