Python 3.6.4 (/Applications/Thonny.app/Contents/Frameworks/Python.framework/Versions/3.6/bin/python3.6)
>>> %Run L18A.py
>>> pt = Point()
>>> pt.x = 0
>>> pt.y = 0
>>> print(pt)
<__main__.Point object at 0x1023c6c18>
>>> %Run L18A.py
>>> pt = Point()
>>> pt.x = 3
>>> pt.y = 4
>>> print_point(pt)
( 3 , 4 )
>>> pt.z = 0
>>> print_point(pt)
( 3 , 4 )
>>> pt.cornflakes = 0
>>> rect = Rectangle()
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
NameError: name 'Rectangle' is not defined
>>> %Run L18A.py
>>> rect = Rectangle()
>>> rect.width = 4
>>> rect.height = 3
>>> rect.pt = Point()
>>> rect.pt.x = 0
>>> rect.pt.y = 0
>>> pt1 = Point()
>>> pt1.x = 8
>>> pt1.y = 7
>>> pt2 = pt1
>>> pt2.x
8
>>> pt2.y
7
>>> pt1.x = 5
>>> pt1.y = 4
>>> pt2.x
5
>>> pt2.y
4
>>> import copy
>>> pt3 = copy.copy(pt1)
>>> pt3.x
5
>>> pt3.y
4
>>> pt1.x = 10
>>> pt1.y = 10
>>> pt3.x
5
>>> pt3.y
4
>>> pt2.y
10
>>> print_point(pt3)
( 5 , 4 )
>>> %Run L18A.py
>>> pt = Point()
>>> pt.x = 3
>>> pt.y = 4
>>> Point.print_point(pt)
( 3 , 4 )
>>> %Run L18A.py
>>> pt1 = Point()
>>> pt1.x
0
>>> pt1.y
0
>>> pt1.x = 9
>>> pt1.y = 8
>>> Point.print_point(pt1)
( 9 , 8 )
>>> %Run L18A.py
>>> pt = Point(2,3)
>>> Point.print_point(pt)
( 2 , 3 )
>>> pt1 = Point()
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
TypeError: __init__() missing 2 required positional arguments: 'x' and 'y'
>>> %Run L18A.py
>>> pt1 = Point()
>>> pt2 = Point(2,2)
>>> Point.print_point(pt1)
( 0 , 0 )
>>> Point.print_point(pt2)
( 2 , 2 )
>>> %Run L18A.py
>>> %Run L18A.py
>>> changestring('cs101')
hellocs101
>>> changestring()
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
TypeError: changestring() missing 1 required positional argument: 's'
>>> %Run L18A.py
>>> changestring()
helloblankstring
>>> varA = 4.0
>>> varB = 'string'
>>> varC = 1
>>> type(varA)
<class 'float'>
>>> type(varb)
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
NameError: name 'varb' is not defined
>>> type(varB)
<class 'str'>
>>> type(varC)
<class 'int'>
>>> point1 = Point(4,5)
>>> isinstance(point1,Point)
True
>>> print(point1)
<__main__.Point object at 0x1011f0198>
>>> %Run L18A.py
>>> point(2,3)
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
NameError: name 'point' is not defined
>>> pt = Point(2,3)
>>> print(pt)
Traceback (most recent call last):
  File "<pyshell>", line 1, in <module>
  File "/Users/jgrant/class/sp.2018/cs101/class/L18A.py", line 9, in __str__
    return '('+self.x+','+self.y+')'
TypeError: must be str, not int
>>> %Run L18A.py
>>> pt = Point(2,3)
>>> print(pt)
(2,3)
>>> Point.print_point(pt)
( 2 , 3 )
>>> %Run L18A.py
>>> p1 = Point(2,3)
>>> p2 = Point(5,5)
>>> d = Point.dist(p1,p2)
>>> print(d)
3.605551275463989
>>>