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import matplotlib.pyplot as plt
import networkx as nx
import numpy as np
import os

import dagology as dag
from diagram_utils import *


    

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%matplotlib inline


    

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# D=1
G = nx.DiGraph()
G.add_edges_from([['a','b'], ['b','c'], ['c','d']])
pos = {'a':[0,0],
       'b':[0,1],
       'c':[0,2],
       'd':[0,3]}
labels={n:n for n in G.nodes()}
nx.draw(G, pos=pos, labels=labels, node_color=tableau20[7], node_size=500)


    

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# D=2
G = nx.DiGraph()
G.add_edges_from([['a','x'], ['a','y'], ['a','z'], 
                  ['b','x'], ['b','y'], ['b','z'],
                  ['c','x'], ['c','y'], ['c','z']])
pos = {'a':[-1,0],
       'b':[0,0],
       'c':[1,0],
       'x':[-1,2],
       'y':[0,2],
       'z':[1, 2]}
labels={n:n for n in G.nodes()}
nx.draw(G, pos=pos, labels=labels, node_color=tableau20[7], node_size=500)


    

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# D=3
G = nx.DiGraph()
G.add_edges_from([['a','i'], ['a','j'], ['a','k'], 
                  ['i','p'], ['i','q'],
                  ['j','p'], ['j','r'],
                  ['k','q'], ['k', 'r'],
                  ['p','x'], ['q','x'], ['r','x']])
pos = {'a':[0,0],
       'i':[-1,1],
       'j':[0,1],
       'k':[1,1],
       'p':[-1,2],
       'q':[0,2],
       'r':[1,2],
       'x':[0, 3]}
labels={n:n for n in G.nodes()}
nx.draw(G, pos=pos, labels=labels, node_color=tableau20[7], node_size=500, alpha=1)