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Python快速介绍 ::-- ZoomQuiet [DateTime(2007-03-22T12:02:49Z)] TableOfContents
1. s5
[wiki:localshare/classes/0904-tutpy/tutpython001/ V0.7 Python介绍] -- [:BPUG/2005-09-04:Python入门第一班--漫谈Python语言]05-09-04
[wiki:localshare/classes/Classes2006/061009-pytut/ V0.8 Python介绍] -- [:BPUG/2006-12-02:CPUG第13次.中科院研究生院开源软件协会]06-12-02
[wiki:localshare/classes/classes2007/070322-introPy/ V0.9 Python快速介绍] -- 07-03-22新浪内部第2次推广
- s5下载:[wiki:localshare/classes/classes2007/070322-introPy.7z 070322-introPy.7z]
1.1. 演示备案
备课,经典Pythonic 代码以支持展示
dir() help()
Include(PyPrimeNumberGenerator)
展示思路... Include(PyPrimeNumberGenerator)
{{{工厂模式... In [174]: def doit(do,i,j): In [125]: def myfun(*args): ....: 1.1.1. iPython
1.1.2. 高级数据类型
In [1]: li = range(10)
In [2]: li
Out[2]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
In [3]: li[6]
Out[3]: 6
In [4]: li[:6]
Out[4]: [0, 1, 2, 3, 4, 5]
In [5]: li[6:]
Out[5]: [6, 7, 8, 9]
In [6]: li[:-6]
Out[6]: [0, 1, 2, 3]
In [7]: li[-6:]
Out[7]: [4, 5, 6, 7, 8, 9]
In [8]: li[::3]
Out[8]: [0, 3, 6, 9]
In [9]: li[:6:3]
Out[9]: [0, 3]
In [10]: li[6::3]
Out[10]: [6, 9]
In [11]: li[3:9:3]
Out[11]: [3, 6]
In [12]: li[3:9]
Out[12]: [3, 4, 5, 6, 7, 8]
1.1.2.1. 乘法表
In [13]: for i in range(1,10,1): [ i*j for j in range(1,i) ]
....:
Out[13]: []
Out[13]: [2]
Out[13]: [3, 6]
Out[13]: [4, 8, 12]
Out[13]: [5, 10, 15, 20]
Out[13]: [6, 12, 18, 24, 30]
Out[13]: [7, 14, 21, 28, 35, 42]
Out[13]: [8, 16, 24, 32, 40, 48, 56]
Out[13]: [9, 18, 27, 36, 45, 54, 63, 72]
1.1.2.2. 单行素数生成器!
In [154]: a=7
In [156]: [d for d in range(2,a-1)]
Out[156]: [2, 3, 4, 5]
In [155]: [a%d for d in range(2,a-1)]
Out[155]: [1, 1, 3, 2]
In [162]: a=8
In [163]: 0 not in [a%d for d in range(2,a-1)]
Out[163]: False
In [167]: N=10
In [168]: [p for p in range(2,N) if 0 not in [p%d for d in range(2,p-1)]]
Out[168]: [2, 3, 5, 7]
1.1.3. 函式参数
try function def
....:
In [139]: def myfun(**kvar):
- ....: print kvar
- ....: for k in kvar:
- ....: kvar[k]+=2
- ....: print kvar
In [140]: myfun(k1=12,k2=23) {'k2': 23, 'k1': 12} {'k2': 25, 'k1': 14} }}}
1.1.4. OOP
重载运算符+
In [15]: class nplus: ....: def __init__(self,one): ....: self.one = one ....: def __add__(self,two): ....: return self.one*two In [16]: a=nplus(10) In [17]: a+2 Out[17]: 20
1.1.4.1. 自省!
In [19]: def reprself(item): ....: print "ID :",id(item) ....: print "TYPE :",type(item) ....: print "VALUE:",repr(item) ....: if hasattr(item,"__name__"): ....: print "NAME::",item.__name__ ....: if hasattr(item,"__calss__"): ....: print "CLASS::",item.__calss__.__name__ In [20]: reprself(reprself) ID : -1212717100 TYPE : <type 'function'> VALUE: <function reprself at 0xb7b767d4> NAME:: reprself In [21]: reprself(123) ID : 136453144 TYPE : <type 'int'> VALUE: 123 In [22]: reprself("123") ID : -1212647168 TYPE : <type 'str'> VALUE: '123' In [23]: reprself([1,2,3]) ID : -1212664436 TYPE : <type 'list'> VALUE: [1, 2, 3] In [24]: reprself((1,2,3)) ID : -1212700676 TYPE : <type 'tuple'> VALUE: (1, 2, 3) In [25]: reprself({1:"1","2":2,3:[3,]}) ID : -1212705004 TYPE : <type 'dict'> VALUE: {3: [3], 1: '1', '2': 2}
- 追溯谁父辈:
{{{import traceback In [200]: def callme():
- ....: s = traceback.extract_stack()
- ....: print "i'd call by %s !" % s[-2][2]
In [201]: fun1() i'd call by fun1 ! }}}
==== MixIn ===
In [202]: class A: .....: def __init__(self): .....: self.name = "class A" .....: def do(self): .....: print self.name In [203]: class B: .....: def __init__(self): .....: self.name = "class B" .....: def add(self,a,b): .....: return a+b In [212]: A.__bases__ +=(B,) In [213]: A. A.__doc__ A.__init__ A.__module__ A.add A.do
1.1.4.2. Plugin
def p2(self,*arg):print "in %s !!!! %s"%(self.name,arg) setattr(A,"plugin",p2)
1.1.5. 对象序列化
In [234]: lis=[1,2,"as",[1,2],(2,3,3),{}] In [235]: pickle.dump(lis,open("lisA.dump","w")) In [237]: li2 = pickle.load(open("lisA.dump")) In [238]: li2 Out[238]: [1, 2, 'as', [1, 2], (2, 3, 3), {}]
1.1.6. 编译字节文件
def myfunc(alist): return len(alist) the following command can be used to get the disassembly of myfunc(): import dis >>> dis.dis(myfunc) 2 0 LOAD_GLOBAL 0 (len) 3 LOAD_FAST 0 (alist) 6 CALL_FUNCTION 1 9 RETURN_VALUE 10 LOAD_CONST 0 (None) 13 RETURN_VALUE
1.2. 函式编程
map(func, list, …) 相当于[func(l) for l in list] In [241]: map((lambda x:x*x),range(10)) Out[241]: [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] In [254]: map((lambda x,y:x+y),range(0,10,1),range(10,0,-1)) Out[254]: [10, 10, 10, 10, 10, 10, 10, 10, 10, 10] In [257]: a=range(1,10,2) In [258]: a Out[258]: [1, 3, 5, 7, 9] In [259]: b=range(10,0,-2) In [260]: b Out[260]: [10, 8, 6, 4, 2] In [264]: zip(a,b) Out[264]: [(1, 10), (3, 8), (5, 6), (7, 4), (9, 2)] In [101]: [(lambda x,y : x+y)(i,j) for i,j in zip(a,b)] Out[101]: [11, 11, 11, 11, 11] In [102]: ["%s-%s "%(i,j) for i,j in zip(a,b)] Out[102]: ['1-10 ', '3-8 ', '5-6 ', '7-4 ', '9-2 ']
1.2.1. 中蟒
Include(ChinesePython/tasting)