将 numpy 数组传递给 function 给出类型错误

Question

Not sure why I keep getting an error when I try to plot a bar chart.

 def plotBar(x,y):
    plt.bar(x, y, width=1, align='center', color='plum', edgecolor='firebrick',linewidth=1)
    plt.show()

In main I am calling the function like this:

x1=np.arange(1,101)
y1=np.arange(50,151)

classname.plotBar(x1,y1)

However, I keep getting this error:

TypeError: plotBar() takes 2 positional arguments but 3 were given

Answer 1

I declared your function as a static method in a class:

class Xxx:
    @staticmethod
    def plotBar(x,y):
        plt.bar(x, y, width=1, align='center', color='plum',
            edgecolor='firebrick', linewidth=1)
        plt.show()

The next correction is that both arrays have to be of equal length, so I changed definition of y , so that it also has 100 elements:

x1 = np.arange(1,101)
y1 = np.arange(51,151)

(previously it had 101 elements).

Then I called it:

Xxx.plotBar(x1,y1)

and got a picture.