Dijkstra

Error : [WinError 2] Le fichier spécifié est introuvable : ['dot', '-Gbgcolor=none', '-Gcolor=#789abc', '-Gfontcolor=#789abc', '-Ncolor=#789abc', '-Nfontcolor=#789abc', '-Ecolor=#789abc', '-Efontcolor=#789abc', '-Tpng']

graph G {
    node [shape=circle, style=filled, fontsize=10];

    A [fillcolor=lightgreen, label="A\nd=0"];
    B [fillcolor=lightgreen, label="B\nd=4"];
    C [fillcolor=lightgreen, label="C\nd=2"];
    D [fillcolor=lightgreen, label="D\nd=9"];
    E [fillcolor=lightgreen, label="E\nd=5"];
    F [fillcolor=lightgreen, label="F\nd=11"];
    G [fillcolor=lightgreen, label="G\nd=11"];
    H [fillcolor=lightyellow, label="H\nd=14→12"];
    I [fillcolor=lightyellow, label="I\nd=15"];
    J [fillcolor=lightgrey, label="J"];

    A -- B [label="4"];
    A -- C [label="2"];
    B -- D [label="5"];
    C -- D [label="8"];
    C -- E [label="3"];
    D -- F [label="2"];
    E -- F [label="9"];
    E -- G [label="6"];
    F -- H [label="3"];
    G -- H [label="1", color=red, penwidth=2];
    G -- I [label="4"];
    H -- J [label="5"];
    I -- J [label="2"];
}