title: Creating curved edges with NetworkX in Python3
body: <p>I would like to use networkx (i would also like to take another framework if you know a better one) to create a
  graps whose nodes are at fixed positions. At the same time the edges of the graph should not overlap.</p>
  
  <p>My previous code looks like this:</p>
  
  <pre><code>#!/usr/bin/env python3
  
  import networkx as nx
  import matplotlib.pyplot as plt
  
  # Graph data
  names = ['A', 'B', 'C', 'D', 'E']
  positions = [(0, 0), (0, 1), (1, 0), (0.5, 0.5), (1, 1)]
  edges = [('A', 'B'), ('A', 'C'), ('A', 'D'), ('A', 'E'), ('D', 'A')]
  
  # Matplotlib figure
  plt.figure('My graph problem')
  
  # Create graph
  G = nx.MultiDiGraph(format='png', directed=True)
  
  for index, name in enumerate(names):
      G.add_node(name, pos=positions[index])
  
  labels = {}
  for edge in edges:
      G.add_edge(edge[0], edge[1])
      labels[(edge[0], edge[1])] = '{} -&gt; {}'.format(edge[0], edge[1])
  
  layout = dict((n, G.node[n]["pos"]) for n in G.nodes())
  nx.draw(G, pos=layout, with_labels=True, node_size=300)
  nx.draw_networkx_edge_labels(G, layout, edge_labels=labels)
  
  plt.show()
  </code></pre>
  
  <p>and gives the following result</p>
  
  <p><a href="https://i.stack.imgur.com/cQqOQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/cQqOQ.png" alt="enter image description here"></a></p>
  
  <p>How do I make sure that the edges are "rounded" so that they don't overlap?</p>