[Python] MovieWriter imagemagick unavailable

Discussão em 'Python' iniciado por Stack, Maio 24, 2025.

  1. Stack

    Stack Membro Participativo

    I am trying to animate the graph, but jupyter is giving error:

    MovieWriter imagemagick unavailable. And just animating the 1st image(which is obvious as MovieWriter is not working). How to fix it?

    Python version: 3

    Here is the code

    import numpy as np
    import matplotlib.pyplot as plt
    import networkx as nx
    from matplotlib.animation import FuncAnimation

    # number of nodes
    size = 10

    # generate graph
    G=nx.complete_graph(size)

    frame = np.random.randint(0, 5, (size, size)) # random ndarray between 0 and 5, length and number of frames = number of nodes in the graph

    pos = nx.spring_layout(G)
    nodes = nx.draw_networkx_nodes(G,pos)
    edges = nx.draw_networkx_edges(G,pos)
    plt.axis('off')

    def update(i):
    nc = frame # np.random.randint(2, size=200)
    nodes.set_array(nc)
    return nodes,

    # output animation; its important I save it
    fig = plt.gcf()
    ani = FuncAnimation(fig, update, interval=50, frames=range(size), blit=True)
    ani.save('crap.gif', writer='imagemagick', savefig_kwargs={'facecolor':'white'}, fps=1)



    Expectation: Animation should be working and will be able to show the updated color

    Continue reading...

Compartilhe esta Página