matplotlib.pyplot.legend() gives TypeError: 'bool' object is not callable

Question

Here's my code to plot my model accuracies/losses.

    import matplotlib.pyplot as plt
    train_acc, = np.array(hist.history.get('acc'))
    val_acc, = np.array(hist.history.get('val_acc'))
    plt.figure()
    epochs=np.arange(len(train_acc))
    plt_train_acc = plt.plot(epochs,train_acc,'r',label='Train_Acc')
    plt_val_acc = plt.plot(epochs,val_acc,'b',label='Val_Acc')
    plt.title('Acc Trends')
    plt.ylabel('Acc')
    plt.xlabel('Epochs')
    plt.legend( [plt_train_acc,plt_val_acc],
                [train_acc,val_acc], )
    plt.savefig("trendsPlot.jpg")
    plt.show()

But I get "TypeError: 'bool' object is not callable" error for the line plt.legend

Restart Kerner and Clear All Output, run your code, and see if it still does the same thing. Also, change plt.legend( [plt_train_acc,plt_val_acc], [train_acc,val_acc], ) to just plt.legend(). — Trenton McKinney
– Trenton McKinney, Commented Jul 1, 2020 at 5:49
If that doesn't resolve the issue, then you'll need to create a reproducible copy of the DataFrame with df.head(10).to_clipboard(sep=','), edit the question, and paste the clipboard into a code block or include synthetic data: How to make good reproducible pandas examples — Trenton McKinney
– Trenton McKinney, Commented Jul 1, 2020 at 5:52

Mehedee Hassan · Accepted Answer · 2020-09-09 00:15:22Z

1

I don't know why but I also had to face the same problem sometimes when using 'Jupiter notebook' I had to restart the kernel to use again. You can use axes object of subplots , the sample code is below.

import matplotlib.pyplot as plt1


fig, ax = plt1.subplots(figsize=(5, 3))
ax.plot([1,2,3,4,5,6,7],[44,55,66,77,88,99,11],color='orange',label='real value')
ax.plot([1,2,3,4,5,6,7],[144,155,166,177,188,199,111],color='blue',label='prediction')
ax.legend(bbox_to_anchor=(1, 1), loc='upper left', borderaxespad=0.)
fig.tight_layout()

edited Sep 9, 2020 at 0:15

answered Sep 8, 2020 at 8:56

Mehedee Hassan

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takatsukiAzura · Accepted Answer · 2021-04-26 07:29:13Z

0

I solved this problem by reinstalling 'SciPy'. It not only solved the problem above, but also solved the problem that I can't import 'seaborn' and 'missingno'.

By the way, I was confused that they only happened in 'jupyter notebook', but not in 'spyder' and 'pycharm'.

answered Apr 26, 2021 at 7:29

takatsukiAzura

1

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Log20 · Accepted Answer · 2023-10-19 03:26:34Z

0

The reason this happened is that you had erroneously used plt.legend= instead of plt.legend() in the past, this would cause the function to be assigned the value you first inputted and change the function to a variable, that's why it said the function is a bool variable and is not callable, the only way to fix it as far as I'm aware is to restart the kernel to reset the module.

edited Oct 19, 2023 at 3:26

answered Oct 19, 2023 at 3:26

Log20

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