Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
>>> gen_str(10)
'oqmfpojlmr'
>>> L = gen_str(10**7) #too much time!
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    L = gen_str(10**7)
  File "C:\Documents and Settings\eladlibm\Desktop\hash.py", line 36, in gen_str
    s += random.choice(alphabet)
  File "C:\Python32\lib\random.py", line 250, in choice
    i = self._randbelow(len(seq))
  File "C:\Python32\lib\random.py", line 226, in _randbelow
    r = getrandbits(k)          # 0 <= r < 2**k
KeyboardInterrupt
>>> L = gen_str(10**6) #OK
>>> L[:10]
'zmkorhfukz'
>>> repeat_naive(L, 100) #too much time for the naive solution
Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    repeat_naive(L, 100)
  File "C:\Documents and Settings\eladlibm\Desktop\hash.py", line 8, in repeat_naive
    if st[i:i+l]==st[j:j+l]:
KeyboardInterrupt
>>> repeat_hash2(L, 100) #fast
False
>>> repeat_hash1(L, 100) #a bit slower
False


Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
>>> L = [1,5,7,2]
>>> iL = iter(L)
>>> type(iL)
<class 'list_iterator'>
>>> next(iL)
1
>>> next(iL)
5
>>> next(iL)
7
>>> next(iL)
2
>>> next(iL)
Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    next(iL)
StopIteration
>>> iL2 = iter(L)
>>> next(iL2)
1
>>> iL = iter(L)
>>> next(iL2)
5
>>> next(iL2)
7
>>> next(iL3)
Traceback (most recent call last):
  File "<pyshell#19>", line 1, in <module>
    next(iL3)
NameError: name 'iL3' is not defined
>>> next(iL)
1
>>> for e in L: #creats the iterator for L and starts calling next
	print(e)

	
1
5
7
2
>>> g = countdown_gen()
>>> type(g)
<class 'generator'>
>>> next(g)
5
>>> next(g)
4
>>> next(g)
3
>>> next(g)
2
>>> next(g)
1
>>> next(g)
'launch'
>>> next(g)
Traceback (most recent call last):
  File "<pyshell#32>", line 1, in <module>
    next(g)
StopIteration
>>> g2 = countdown_gen()
>>> for e in g2:
	print(e)

	
5
4
3
2
1
launch
>>> countdown_gen()
<generator object countdown_gen at 0x00FDB918>
>>> 
>>> L = Evens_list(10**8)
Traceback (most recent call last):
  File "<pyshell#51>", line 1, in <module>
    L = Evens_list(10**8)
  File "C:\Documents and Settings\eladlibm\Desktop\T10\A10_iterators.py", line 13, in Evens_list
    return [num for num in range(n) if num%2==0]
  File "C:\Documents and Settings\eladlibm\Desktop\T10\A10_iterators.py", line 13, in <listcomp>
    return [num for num in range(n) if num%2==0]
MemoryError

#too much memory for my old lap!

>>> L = Evens_list(10**8//2) #memory usage goes up
>>> for e in L:
	pass

>>> del L #memory down
>>> L2 = Evens_gen(10**8) #memory usage does not go up
>>> for e in L2:
	pass

>>> g = (num for num in range(10**8) if num%2==0) #generator expression
>>> next(g)
0
>>> type(g)
<class 'generator'>
>>> 


Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
>>> join_many(im, add(im,30)).display()
>>> join_many(im, negate(im)).display()
>>> join_many(im, what(im)).display()
>>> join_many(im, upside_down(im)).display()
>>> ================================ RESTART ================================
>>> 
##########################
## we werote this in class
def upside_down2(im):
    n,m = im.dim()
    im2 = Matrix(n,m)
    im2.rows = im.rows[:]
    im2.rows.reverse()
    return im2
##########################
>>> 
>>> join_many(im, upside_down2(im)).display()
>>> join_many(im, upside_down_self(im)).display()
>>> ================================ RESTART ================================
>>> 
>>> join_many(im, shift(im,50)).display()
>>> join_many(im, stretch(im,'h',2)).display()
>>>