python错误类型 ：AttributeError: 'Line2D' object has no property 'hold'

Question

问题相关代码，请勿粘贴截图

首先粘贴代码

plt.axvline(med,color='g',hold=None,linestyle='--',alpha=0.8)
plt.text(mean+5,0.015,'中位数：%i'%med,color='g')

错误类型

AttributeError                            Traceback (most recent call last)
<ipython-input-174-ed5ef390ce6e> in <module>
     10 med=data['value'].median()
     11 print('中位数为%i'%med)
---> 12 plt.axvline(med,color='g',hold=None,linestyle='--',alpha=0.8)
     13 plt.text(mean+5,0.015,'中位数：%i'%med,color='g')

~\anaconda3\lib\site-packages\matplotlib\pyplot.py in axvline(x, ymin, ymax, **kwargs)
   2471 @_copy_docstring_and_deprecators(Axes.axvline)
   2472 def axvline(x=0, ymin=0, ymax=1, **kwargs):
-> 2473     return gca().axvline(x=x, ymin=ymin, ymax=ymax, **kwargs)
   2474 
   2475 

~\anaconda3\lib\site-packages\matplotlib\axes\_axes.py in axvline(self, x, ymin, ymax, **kwargs)
    914 
    915         trans = self.get_xaxis_transform(which='grid')
--> 916         l = mlines.Line2D([x, x], [ymin, ymax], transform=trans, **kwargs)
    917         self.add_line(l)
    918         self._request_autoscale_view(scalex=scalex, scaley=False)

~\anaconda3\lib\site-packages\matplotlib\lines.py in __init__(self, xdata, ydata, linewidth, linestyle, color, marker, markersize, markeredgewidth, markeredgecolor, markerfacecolor, markerfacecoloralt, fillstyle, antialiased, dash_capstyle, solid_capstyle, dash_joinstyle, solid_joinstyle, pickradius, drawstyle, markevery, **kwargs)
    388         # update kwargs before updating data to give the caller a
    389         # chance to init axes (and hence unit support)
--> 390         self.update(kwargs)
    391         self.pickradius = pickradius
    392         self.ind_offset = 0

~\anaconda3\lib\site-packages\matplotlib\artist.py in update(self, props)
    994                     func = getattr(self, f"set_{k}", None)
    995                     if not callable(func):
--> 996                         raise AttributeError(f"{type(self).__name__!r} object "
    997                                              f"has no property {k!r}")
    998                     ret.append(func(v))

AttributeError: 'Line2D' object has no property 'hold'


![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/549303773846191.png "#left")

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/520992773846154.png "#left")

没报错的话应该会出现一个有一条曲线，三条竖直线的图
报错与hold有关
这要怎么改啊，求帮忙

Answer 1

函数貌似没这个参数。 把这个hold=none 去掉试试

matplotlib.pyplot.axvline — Matplotlib 3.5.1 documentation https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.axvline.html