Лог занятия по парадигмам, 28.09.2016

   1: >>> a=[]
   2:
>>> for i in range(10):
...     a.append(i)
...
   3: >>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
   4: >>> a=[]
   5: >>> %rep 2
   6: >>> a=[]
   7: >>> for i in range(10): a.append(i * i)
   8: >>> a
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
   9: >>> for i in range(10): a.append(i * i)
  10: >>> a
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
  11: >>> a=[0,0,0,2,2,4,4,5,6,6]
  12: >>> ans=[(0,3), (2,2), (4,2), (5,1), (6,2)]
  13: >>> out=[]
  14: >>> %edit
'def lre_encode(a):\n    if not a:\n        out=[]\n    else:\n        out=[[a[0], 1]]\n        for elem in a[1:]:\n            if out[-1][0] == elem:\n                out[-1][1] += 1\n            else:\n                out.append([elem, 1])\n    return out\n'
  15: >>> lre_encode(a)
[[0, 3], [2, 2], [4, 2], [5, 1], [6, 2]]
  16: >>> lre_encode([])
[]
  17: >>> lre_encode([100])
[[100, 1]]
  18: >>> lre_encode([100,100])
[[100, 2]]
  19: >>> lre_encode([10] * 100)
[[10, 100]]
  20: >>> lre_encode([0])
[[0, 1]]
  21: >>> a
[0, 0, 0, 2, 2, 4, 4, 5, 6, 6]
  22: >>> a[1:-1]
[0, 0, 2, 2, 4, 4, 5, 6]
  23: >>> as=[]
  24: >>> xs=[]
  25: >>> ys=[]
  26: >>> zs=[]
  27: >>> map(str, [1, 2, 3])
<map at 0x3413d70>
  28: >>> list(map(str, [1, 2, 3]))
['1', '2', '3']
  29: >>> a=[1, 2, 3]
  30: >>> b=[]
  31:
>>> for elem in a:
...     b.append(str(elem))
...
  32: >>> b
['1', '2', '3']
  33: >>> map(str, a)
<map at 0x342c4b0>
  34: >>> list(map(str, a))
['1', '2', '3']
  35: >>> a
[1, 2, 3]
  36: >>> a=[1,1,2,2,2,3,5,5]
  37: >>> out=[]
  38: >>> last_value=None
  39: >>> last_length=0
  40:
>>> for elem in a:
...     if elem == last_value:
...         last_length += 1
...     else:
...         out.append((last_value, last_length))
...         last_value = elem
...         last_length = 1
...
  41: >>> out
[(None, 0), (1, 2), (2, 3), (3, 1)]
  42: >>> out.append((last_value, last_length))
  43: >>> out
[(None, 0), (1, 2), (2, 3), (3, 1), (5, 2)]
  44: >>> if name[0] == "." or name[0] == "~": continue
  45: >>> name.startswith(".")
  46: >>> a, a, b, a = range(4)
  47: >>> a
3
  48: >>> b
2
  49: >>> %paste
  50: >>> x=A()
  51: >>> x=A(100)
  52: >>> print(x)
  53: >>> x.inc_foo()
  54: >>> print(x)
  55: >>> y=B()
  56: >>> y=B(1000)
  57: >>> print(y)
  58: >>> y.inc_foo()
  59: >>> print(y)
  60:
>>> class B(A):
...     def __init__(self):
...         print("B constructed")
...
  61: >>> y=B()
  62: >>> print(y)
  63:
>>> class B(A):
...     def __init__(self):
...         super(B, self).__init__(123)
...
  64: >>> y=B()
  65: >>> print(y)
  66: >>> %paste
  67: >>> x=A()
  68: >>> x.foo()
  69: >>> x.foo()
  70: >>> y=A()
  71: >>> y.foo()
  72: >>> y.foo()
  73: >>> del x.foo
  74: >>> x.foo()
  75: >>> del A.foo
  76: >>> x.foo()
  77: >>> del x.foo
  78: >>> x.foo()
  79: >>> A.foo = lambda self: print("self=", self)
  80: >>> x.foo()
  81: >>> A.__name__
'A'
  82: >>> type(x).__name__
'A'
  83: >>> x.__dict__
{}
  84: >>> x.botva = 0
  85: >>> x.__dict__
{'botva': 0}
  86: >>> vars(x)
{'botva': 0}
  87: >>> vars(A)
mappingproxy({'__weakref__': <attribute '__weakref__' of 'A' objects>, '__dict__': <attribute '__dict__' of 'A' objects>, '__doc__': None, '__module__': '__main__', 'foo': <function <lambda> at 0x034D54F8>})
  88: >>> A.__dict__
mappingproxy({'__weakref__': <attribute '__weakref__' of 'A' objects>, '__dict__': <attribute '__dict__' of 'A' objects>, '__doc__': None, '__module__': '__main__', 'foo': <function <lambda> at 0x034D54F8>})
  89: >>> isinstance(x, A)
True
  90:
>>> class B:
...     pass
...
  91: >>> isinstance(x, B)
False
  92:
>>> class C(A):
...     pass
...
  93: >>> x=C()
  94: >>> isinstance(x, C)
True
  95: >>> isinstance(x, A)
True
  96: >>> isinstance(x, B)
False
  97: >>> x=A()
  98: >>> isinstance(x, A)
True
  99: >>> isinstance(x, B)
False
 100: >>> isinstance(x, C)
False
 101: >>> issubclass(A, B)
False
 102: >>> issubclass(B, A)
False
 103: >>> issubclass(C, A)
True
 104: >>> issubclass(A, C)
False