[Python] Networkx (or Graphviz) rotate node labels clockwise around the center of the plot

I have a similar plot drawn with Networkx/Graphviz:

import networkx as nx
from networkx.drawing.nx_agraph import graphviz_layout

T = nx.balanced_tree(2, 5)
pos = graphviz_layout(T, prog="twopi")
nx.draw_networkx(T, pos, with_labels=True)
plt.show()


Which gives me the following plot:



What I want:

I want that all the node labels are rotated clockwise around the center of the graph. How do i do this? I would prefer a way directly with Networkx or Graphviz.

With "rotated clockwise" I mean similar like the labels on this polar plot:



I also tried with the following code:

T = nx.balanced_tree(2, 5)
pos = graphviz_layout(T, prog="twopi")
nx.draw_networkx(T, pos, with_labels=False)

text = nx.draw_networkx_labels(T, pos=pos)
for _, t in text.items():
t.set_rotation('clockwise')

plt.show()


But for set_rotation() only 'horizontal', 'vertical', numeric value, or None are supported.

I also found similar questions, but non of which could help me:

Does not plot the node labels and it's a quiet old question from 2017, also it seems for me to complicated: NetworkX node labels relative position

Answer is that it is not possible with graphviz in 2019: https://stackoverflow.com/questions/55009159/change-label-orientation-90º-of-a-node-in-graphviz

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