python数据结构练习

hotiice

Microsoft Windows [版本 5.2.3790]
(C) 版权所有 1985-2003 Microsoft Corp.

C:\Documents and Settings\lt>cd \py*

C:\Python25>python
Python 2.5b2 (r25b2:50512, Jul 11 2006, 10:16:14) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> stack =[3,4,5]
>>> stack.append(6)
>>> stack
[3, 4, 5, 6]
>>> stack.pop()
6
>>> stack
[3, 4, 5]
>>> queue =stack
>>> queue.pop(0)
3
>>> queue
[4, 5]
>>> def cu(x):return x*x*x
...
>>> map(cu,queue)
[64, 125]
>>> reduce(cu,queue)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: cu() takes exactly 1 argument (2 given)
>>> def ad(x,y):return x+y
...
>>> reduce(ad,queue)
9
>>> del queue(1)
  File "<stdin>", line 1
SyntaxError: can't delete function call
>>> del queue[1]
>>> queue
[4]
>>>

hotiice

>>> t=1,2,'h'
>>> t
(1, 2, 'h')
>>> u=t,(3,4)
>>> u
((1, 2, 'h'), (3, 4))
>>> x,y,z=t
>>> x
1
>>> y
2
>>> z
'h'
>>> m,n =u
>>> m
(1, 2, 'h')
>>> n
(3, 4)
>>>

hotiice

>>> a=set('asfghhjjda')
>>> b=set('dkjserxe')
>>> a
set(['a', 'd', 'g', 'f', 'h', 'j', 's'])
>>> b
set(['e', 'd', 'k', 'j', 's', 'r', 'x'])
>>> a+b
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for +: 'set' and 'set'
>>> a & b
set(['s', 'j', 'd'])
>>> a | b
set(['a', 'e', 'd', 'g', 'f', 'h', 'k', 'j', 's', 'r', 'x'])
>>> a - b
set(['a', 'h', 'g', 'f'])
>>> b - a
set(['x', 'k', 'r', 'e'])
>>> a ^ b
set(['a', 'e', 'g', 'f', 'h', 'k', 'r', 'x'])
>>> b ^ a
set(['a', 'e', 'g', 'f', 'h', 'k', 'r', 'x'])
>>>

hotiice

>>> import math
>>> dir(math)
['__doc__', '__name__', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos', 'cosh', 'degrees', 'e', 'exp', 'fabs', 'floor', 'fmod',
'frexp', 'hypot', 'ldexp', 'log', 'log10', 'modf', 'pi', 'pow', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh']
>>> import __builtin__
>>> dir (__builtin__)
['ArithmeticError', 'AssertionError', 'AttributeError', 'BaseException', 'DeprecationWarning', 'EOFError', 'Ellipsis', 'Environm
entError', 'Exception', 'False', 'FloatingPointError', 'FutureWarning', 'GeneratorExit', 'IOError', 'ImportError', 'ImportWarnin
g', 'IndentationError', 'IndexError', 'KeyError', 'KeyboardInterrupt', 'LookupError', 'MemoryError', 'NameError', 'None', 'NotIm
plemented', 'NotImplementedError', 'OSError', 'OverflowError', 'PendingDeprecationWarning', 'ReferenceError', 'RuntimeError', 'R
untimeWarning', 'StandardError', 'StopIteration', 'SyntaxError', 'SyntaxWarning', 'SystemError', 'SystemExit', 'TabError', 'True
', 'TypeError', 'UnboundLocalError', 'UnicodeDecodeError', 'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError', 'UserW
arning', 'ValueError', 'Warning', 'WindowsError', 'ZeroDivisionError', '_', '__debug__', '__doc__', '__import__', '__name__', 'a
bs', 'all', 'any', 'apply', 'basestring', 'bool', 'buffer', 'callable', 'chr', 'classmethod', 'cmp', 'coerce', 'compile', 'compl
ex', 'copyright', 'credits', 'delattr', 'dict', 'dir', 'divmod', 'enumerate', 'eval', 'execfile', 'exit', 'file', 'filter', 'flo
at', 'frozenset', 'getattr', 'globals', 'hasattr', 'hash', 'help', 'hex', 'id', 'input', 'int', 'intern', 'isinstance', 'issubcl
ass', 'iter', 'len', 'license', 'list', 'locals', 'long', 'map', 'max', 'min', 'object', 'oct', 'open', 'ord', 'pow', 'property'
, 'quit', 'range', 'raw_input', 'reduce', 'reload', 'repr', 'reversed', 'round', 'set', 'setattr', 'slice', 'sorted', 'staticmet
hod', 'str', 'sum', 'super', 'tuple', 'type', 'unichr', 'unicode', 'vars', 'xrange', 'zip']
>>>