Python x Graphvizの基本的な使い方

sudo apt install graphviz

pip install graphviz

import graphviz

# グラフの種類を有向グラフ、出力形式をpngに設定
dot = graphviz.Digraph(format='png')
# グラフの種類を無向グラフ、出力形式をpngに設定
#dot = graphviz.Graph(format='png')

# ノードの追加
dot.node('A1', 'Kin Arthur')
dot.node('A2', 'Sir Bedevere the Wise')
dot.node('A3', 'Sir Lancelot the Brave')

# エッジの追加
dot.edges([('A1','A2'), ('A1','A3')])
dot.edge('A2', 'A3', constraint='false')

# 画像を出力
dot.render()
# グラフを表示
# dot.view()

import graphviz

# グラフの種類を有向グラフ、出力形式をpngに設定
dot = graphviz.Digraph(format='png')

# グラフの種類を無向グラフ、出力形式をpngに設定
dot = graphviz.Graph(format='png')

# ノードの追加
dot.node('A1', 'Kin Arthur')
dot.node('A2', 'Sir Bedevere the Wise')
dot.node('A3', 'Sir Lancelot the Brave')

# エッジの追加
dot.edges([('A1','A2'), ('A1','A3')])
dot.edge('A2', 'A3', constraint='false')

# 画像を出力
dot.render()

# グラフを表示
dot.view()

# グラフを作成するためのDOT言語を標準出力する
print(dot.source)

digraph {
        A1 [label="Kin Arthur"]
        A2 [label="Sir Bedevere the Wise"]
        A3 [label="Sir Lancelot the Brave"]
        A1 -> A2
        A1 -> A3
        A2 -> A3 [constraint=false]
}

import graphviz

dot_source = """
digraph G {
    A -> B;
    B -> C;
    C -> A;
}
"""

dot = graphviz.Source(dot_source)
dot.render('graph')
dot.view()

import graphviz

# Dotファイルを読み込む
dot = graphviz.Source.from_file('graph.dot')

# グラフを表示
dot.view()

# デフォルトのフォントを指定する場合（例：MSゴシック）
dot.attr('node', fontname='MS Gothic')
dot.attr('edge', fontname='MS Gothic')

# ノードのフォントを個別に指定する場合（例：MSゴシック）
dot.node('A', 'こんにちは', fontname='MS Gothic')
dot.node('B', 'Graphviz', fontname='MS Gothic')

# エッジのフォントを個別に指定する場合（例：MSゴシック）
dot.edge('A', 'B', label='エッジ', fontname='MS Gothic')

dot.node('A', 'Example', shape='box')  # 四角形

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Process', shape='box')
dot.node('B', 'Start', shape='ellipse')
dot.node('C', 'State', shape='circle')
dot.node('D', 'Condition?', shape='diamond')
dot.node('E', 'Input/Output', shape='parallelogram')
dot.node('F', 'Special Process', shape='trapezium')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('G', '''{
    ClassName |
    - attribute1: int \l
    - attribute2: string \l
    |
    + method1(): void \l
    + method2(): int \l
}''', shape='record')
dot.node('H', '{Module | Function1 | Function2}', shape='Mrecord')
dot.node('I', 'Tabbed Box', shape='tab')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', '''{
    <pa> ClassName |
    - attribute1: int \l
    - attribute2: string \l
    |
    + method1(): void \l
    + method2(): int \l
}''', shape='record')

dot.node('B', '''{
    ClassName | 
    - attribute1: int \l
    - attribute2: string \l
    | 
    + method1(): void \l
    + method2(): int \l
}''', shape='record')

dot.edge('A:pa', 'B')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('J', 'Server', shape='box3d')
dot.node('K', 'Database', shape='cylinder')
dot.node('L', 'Redis Cache', shape='component')
dot.node('M', 'Project Folder', shape='folder')
dot.node('N', 'Documentation', shape='note')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('U', 'Final State', shape='doublecircle')
dot.node('V', 'Just Text', shape='plaintext')
dot.node('W', 'Square Node', shape='square')
dot.node('X', 'Rectangle Node', shape='rect')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Egg Shape', shape='egg')
dot.node('B', 'Up Triangle', shape='triangle')
dot.node('C', 'Down Triangle', shape='invtriangle')
dot.node('D', 'House', shape='house')
dot.node('E', 'Inverted House', shape='invhouse')
dot.node('F', 'Pentagon', shape='pentagon')
dot.node('G', 'Hexagon', shape='hexagon')
dot.node('H', 'Septagon', shape='septagon')
dot.node('I', 'Octagon', shape='octagon')
dot.view()

dot.node('A', 'Filled Node', style='filled')

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Filled Node', style='filled', fillcolor='lightblue')
dot.node('B', 'Dashed Border', style='dashed')
dot.node('C', 'Dotted Border', style='dotted')
dot.node('D', 'Bold Border', style='bold')
dot.node('E', 'Rounded Box', shape='box', style='rounded')
dot.node('F', 'Solid Border', style='solid')
dot.node('G', 'Invisible', style='invisible')
dot.node('H', 'Wedged', style='wedged', fillcolor='red:blue:green')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Red Border', color='red')
dot.node('B', 'Green Fill', style='filled', fillcolor='green')
dot.node('C', 'Blue Text', fontcolor='blue')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Big Font', fontsize='20')
dot.node('B', 'Courier Font', fontname='Courier')
dot.node('C', 'Arial Font', fontname='Arial')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.node('A', 'Wide Node', width='2')
dot.node('B', 'Tall Node', height='1.5')
dot.node('C', 'With Margin', margin='0.2')
dot.node('D', 'Normal Label', xlabel='Extra Label')
dot.view()

import graphviz
dot = graphviz.Digraph(format='svg')
dot.node('A', 'Hover me!', tooltip='This is a tooltip')
dot.node('B', 'Click Me', URL='https://www.google.com')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A', 'B', label='Normal Arrow')  # デフォルト
dot.edge('C', 'D', label='Back Arrow', dir='back')
dot.edge('E', 'F', label='Both Arrow', dir='both')
dot.edge('G', 'H', label='Box Head', arrowhead='box', dir='forward')
dot.edge('I', 'J', label='Dot Tail', arrowtail='dot', dir='back')
dot.edge('K', 'L', label='No Arrow', arrowhead='none')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A', 'B', label='Nornal', arrowhead='normal', dir='forward')
dot.edge('C', 'D', label='None', arrowhead='none', dir='forward')
dot.edge('E', 'F', label='Dot', arrowhead='dot', dir='forward')
dot.edge('G', 'H', label='Diamond', arrowhead='diamond', dir='forward')
dot.edge('I', 'J', label='Crow', arrowhead='crow', dir='forward')
dot.edge('K', 'L', label='Tee', arrowhead='tee', dir='forward')
dot.edge('M', 'N', label='Vee', arrowhead='vee', dir='forward')
dot.edge('O', 'P', label='Box', arrowhead='box', dir='forward')
dot.edge('Q', 'R', label='Curve', arrowhead='curve', dir='forward')
dot.edge('S', 'T', label='ICurve', arrowhead='icurve', dir='forward')
dot.edge('U', 'V', label='Inv', arrowhead='inv', dir='forward')
dot.edge('W', 'X', label='LCurve', arrowhead='lcurve', dir='forward')
dot.edge('Y', 'Z', label='RCurve', arrowhead='rcurve', dir='forward')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A', 'B', label='Solid', style='solid')
dot.edge('C', 'D', label='Dashed', style = 'dashed')
dot.edge('E', 'F', label='Dotted', style = 'dotted')
dot.edge('G', 'H', label='Bold', style = 'bold')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A', 'B', label='Red Edge', color='red')
dot.edge('C', 'D', label='Blue Edge', color='blue')
dot.edge('E', 'F', label='Gradient Edge', color='red:blue')
dot.edge('G', 'H', label='Thin Line', penwidth='0.5')
dot.edge('I', 'J', label='Thick Line', penwidth='3.0')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A', 'B', headlabel='Head Label', labeldistance='1.0', labelangle='30')
dot.edge('C', 'D', taillabel='Tail Label', labeldistance='1.0', labelangle='30')
dot.edge('E', 'F', label='Large Font (25pt)', fontsize='25')
dot.edge('G', 'H', label='Small Font (10pt)', fontsize='10')
dot.edge('I', 'J', label='Blue Text', fontcolor='blue')
dot.edge('K', 'L', label='Green Text', fontcolor='green')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.edge('A:n', 'B:ne')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png')

# ノードのデフォルト設定
dot.attr('node', shape='ellipse', style='filled', fillcolor='yellow', fontname='Courier', fontsize='16')

# エッジのデフォルト設定
dot.attr('edge', color='green', penwidth='2.5', fontcolor='black', fontsize='14')

# グラフ全体のデフォルト設定
dot.attr(rankdir='TB', bgcolor='lightblue')

# ノードとエッジを作成
dot.node('A', 'Start')
dot.node('B', 'Decision')
dot.node('C', 'End')

dot.edge('A', 'B', label='Proceed?')
dot.edge('B', 'C', label='Finish')

dot.view()

import graphviz
dot = graphviz.Digraph(format='png')
dot.attr(rankdir='BT')
dot.edge('A', 'B')
dot.view()

import graphviz

dot = graphviz.Digraph(format='png', graph_attr={'rankdir': 'TB'})  # 上から下

# ランク1（ルートノード）
with dot.subgraph(name='cluster_rank1') as rank1:
    rank1.attr(label='Rank 1', color='black', style='filled', fillcolor='lightgray')
    rank1.node('A', 'Root')

# ランク2
with dot.subgraph(name='cluster_rank2') as rank2:
    rank2.attr(label='Rank 2', color='black', style='filled', fillcolor='lightgray')
    rank2.attr(rank='same')  # 横並びにする
    rank2.node('B1')
    rank2.node('B2')

# ランク3
with dot.subgraph(name='cluster_rank3') as rank3:
    rank3.attr(label='Rank 3', color='black', style='filled', fillcolor='lightgray')
    rank3.attr(rank='same')  # 横並びにする
    rank3.node('C1')
    rank3.node('C2')
    rank3.node('C3')

# ランク4
with dot.subgraph(name='cluster_rank4') as rank4:
    rank4.attr(label='Rank 4', color='black', style='filled', fillcolor='lightgray')
    rank4.attr(rank='same')  # 横並びにする
    rank4.node('D1')
    rank4.node('D2')
    rank4.node('D3')
    rank4.node('D4')

# ランク5（最下層）
with dot.subgraph(name='cluster_rank5') as rank5:
    rank5.attr(label='Rank 5', color='black', style='filled', fillcolor='lightgray')
    rank5.attr(rank='same')  # 横並びにする
    rank5.node('E1')
    rank5.node('E2')

# エッジの追加（ツリー構造）
dot.edge('A', 'B1')
dot.edge('A', 'B2')

dot.edge('B1', 'C1')
dot.edge('B1', 'C2')
dot.edge('B2', 'C3')

dot.edge('C1', 'D1')
dot.edge('C1', 'D2')
dot.edge('C2', 'D3')
dot.edge('C3', 'D4')

dot.edge('D1', 'E1')
dot.edge('D3', 'E2')

dot.view()

import graphviz
dot = graphviz.Digraph(format='png', engine='dot')
dot.edge('A', 'B')
dot.edge('A', 'C')
dot.edge('B', 'D')
dot.edge('C', 'E')
dot.view()

import graphviz
dot = graphviz.Graph(format='png', engine='neato')
#dot = graphviz.Graph(format='png', engine='fdp')
#dot = graphviz.Graph(format='png', engine='sfdp')
dot.edge('A', 'B')
dot.edge('A', 'C')
dot.edge('B', 'D')
dot.edge('C', 'E')
dot.edge('D', 'E')
dot.view()

import graphviz
dot = graphviz.Digraph(format='png', engine='twopi')
dot.node('A', shape='circle', style='filled', fillcolor='lightblue')
for i in range(1, 6):
    dot.node(str(i), shape='circle', style='filled', fillcolor='lightgray')
    dot.edge('A', str(i))
dot.view()

import graphviz

dot = graphviz.Digraph(format='png', engine='circo')

# 駅のノードを環状に配置
stations = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H']

for i in range(len(stations)):
    dot.edge(stations[i], stations[(i + 1) % len(stations)], label=f'Line {i+1}')

# 一部の駅から中央駅へ接続（放射状の接続）
dot.node('Center', 'Main Station', shape='doublecircle', style='filled', fillcolor='yellow')

dot.edge('A', 'Center', label='Express')
dot.edge('D', 'Center', label='Express')
dot.edge('G', 'Center', label='Express')

dot.view()

import graphviz

dot = graphviz.Digraph(format='png', engine='osage')
dot.node('CEO', 'CEO', shape='box', style='filled', fillcolor='lightblue')

# 営業部門
dot.node('Sales_Head', 'Sales Head', shape='box', style='filled', fillcolor='lightgray')
dot.node('Sales_1', 'Sales Manager A')
dot.node('Sales_2', 'Sales Manager B')

# 技術部門
dot.node('Tech_Head', 'Tech Head', shape='box', style='filled', fillcolor='lightgray')
dot.node('Dev_1', 'Developer A')
dot.node('Dev_2', 'Developer B')

# 人事部門
dot.node('HR_Head', 'HR Head', shape='box', style='filled', fillcolor='lightgray')
dot.node('HR_1', 'HR Manager')

# エッジの設定
dot.edge('CEO', 'Sales_Head')
dot.edge('CEO', 'Tech_Head')
dot.edge('CEO', 'HR_Head')

dot.edge('Sales_Head', 'Sales_1')
dot.edge('Sales_Head', 'Sales_2')

dot.edge('Tech_Head', 'Dev_1')
dot.edge('Tech_Head', 'Dev_2')

dot.edge('HR_Head', 'HR_1')

dot.view()