用python编写代码调用cad时，pyautocad库缺失 ，如何安装pyautocad?
代码如下：import pyautocad
acad=Autocad()
acad.prompt("Hello, Autocad from Python\n")
p1 = APoint(0, 0)
p2 = APoint(50, 25)
for i in range(5):
text = acad.model.AddText('Hi %s!' % i, p1, 2.5)
acad.model.AddLine(p1, p2)
acad.model.AddCircle(p1, 10)
p1.y += 10
dp = APoint(10, 0)
for text in acad.iter_objects('Text'):
print('text: %s at: %s' % (text.TextString, text.InsertionPoint))
text.InsertionPoint = APoint(text.InsertionPoint) + dp
for obj in acad.iter_objects(['Circle', 'Line']):
print(obj.ObjectName)
问题如下：

需要先安装pyautocad pip install pyautocad