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In [57]: xs = [42]                                                              

In [58]: line = xs                                                              

In [59]: line                                                                   
Out[59]: [42]

In [60]: line, = xs                                                             

In [61]: line                                                                   
Out[61]: 42

Code: Alles auswählen

In [62]: line = xs[0]                                                           

In [63]: line                                                                   
Out[63]: 42

Code: Alles auswählen

import collections
import matplotlib
import matplotlib.pyplot as plt
from matplotlib import animation

def update(data, plots):
    plots.set_ydata(data)
    return plots

def data_gen(data, filename):
    with open(filename) as lines:
        for line in lines:
            data.append(float(line))
            yield data

def main():
    #configure the graph itself
    filename = "pipe"
    amount = 1000
    data = collections.deque([0] * amount, amount)
    fig, ax = plt.subplots()
    plots = ax.plot(data)
    ax.set_ylim(0, 256)
    ani = animation.FuncAnimation(fig, update, data_gen(data, filename), fargs=(plots,), interval=10, blit=True)
    plt.show()

if __name__ == '__main__':
    main()