回答此问题可获得 20 贡献值,回答如果被采纳可获得 50 分。
<p>我有这段代码,但当我尝试使用重新定义的str函数时,它不会打印任何内容,更重要的是,名为“cuadrant”的已定义函数不起作用,因为它不是根据python定义的,但它是:</p>
<pre><code>class Point:
def __init__(self, x = 0, y = 0):
self.x = x
self.y = y
print('The point ({},{}) has been created'.format(self.x, self.y))
def __del__(self):
print('The point ({},{}) has been deleted or overwritten'.format(self.x, self.y))
def __str__(self):
return '({},{})'.format(self.x, self.y)
def cuadrant(self):
if self.x > 0 and self.y > 0:
return '1st Cuadrant'
elif self.x < 0 and self.y > 0:
return '2nd Cuadrant'
elif self.x < 0 and self.y < 0:
return '3rd Cuadrant'
elif self.x >0 and self.y < 0:
return '4th Cuadrant'
else:
return 'Original Point'
A = Point(4, 5)
B = Point(8, 9)
str(A)
str(B)
cuadrant(A)
cuadrant(B)
</code></pre>
<p>我收到的错误消息如下:</p>
<pre><code>runfile('C:/Users/Jorge87/Desktop/Master Tema 1.5/prueba.py', wdir='C:/Users/Jorge87/Desktop/Master
Tema 1.5')
The point (4,5) has been created
The point (8,9) has been created
Traceback (most recent call last):
File "<ipython-input-9-16e5df591861>", line 1, in <module>
runfile('C:/Users/Jorge87/Desktop/Master Tema 1.5/prueba.py', wdir='C:/Users/Jorge87/Desktop/Master
Tema 1.5')
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line
827, in runfile
execfile(filename, namespace)
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line
110, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File "C:/Users/Jorge87/Desktop/Master Tema 1.5/prueba.py", line 38, in <module>
cuadrant(A)
NameError: name 'cuadrant' is not defined
</code></pre>