notebook.community

Edit and run



In [4]:

    
s1 = "abc"
tpl = ()
lst = []
st = set()
dct = {}



In [ ]:



In [3]:

    
def show(lst):
    print [(type(x)) for x in lst]



In [5]:

    
show((s1,tpl,lst,st,dct))









    



[<type 'str'>, <type 'tuple'>, <type 'list'>, <type 'set'>, <type 'dict'>]



In [7]:

    
print ord('a')
print chr(97)



In [10]:

    
print '\\127.0.0.1\share\\'









    



\127.0.0.1\share\



In [22]:

    
print r"\\127.0.0.1\share\\"









    



\\127.0.0.1\share\\



In [ ]:



In [ ]:



In [19]:

    
s1 = "你好"
s2 = u"你好"
print type(s1)
print s1


print type(s2)
print s2









    



<type 'str'>
你好
<type 'unicode'>
你好



In [23]:

    
dir(str)









    Out[23]:





['__add__',
 '__class__',
 '__contains__',
 '__delattr__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__getattribute__',
 '__getitem__',
 '__getnewargs__',
 '__getslice__',
 '__gt__',
 '__hash__',
 '__init__',
 '__le__',
 '__len__',
 '__lt__',
 '__mod__',
 '__mul__',
 '__ne__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__rmod__',
 '__rmul__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '_formatter_field_name_split',
 '_formatter_parser',
 'capitalize',
 'center',
 'count',
 'decode',
 'encode',
 'endswith',
 'expandtabs',
 'find',
 'format',
 'index',
 'isalnum',
 'isalpha',
 'isdigit',
 'islower',
 'isspace',
 'istitle',
 'isupper',
 'join',
 'ljust',
 'lower',
 'lstrip',
 'partition',
 'replace',
 'rfind',
 'rindex',
 'rjust',
 'rpartition',
 'rsplit',
 'rstrip',
 'split',
 'splitlines',
 'startswith',
 'strip',
 'swapcase',
 'title',
 'translate',
 'upper',
 'zfill']



In [ ]:



In [ ]:



In [20]:

    
def sub_string(s1):
    if isinstance(s1,str):
        print s1.decode("utf8")[0]
    elif isinstance(s1,unicode)    :
        print s1[0]



In [25]:

    
"x    something x   ".lstrip(" x").rstrip()









    Out[25]:





'something x'



In [41]:

    
s1= "0123456789"
print s1[1:-1:1]
print s1[::-2]
print s1[-3:-1]



In [42]:

    
range(0,19)









    Out[42]:





[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18]



In [43]:

    
range(0,12,3)









    Out[43]:





[0, 3, 6, 9]



In [44]:

    
range(10,1,-1)









    Out[44]:





[10, 9, 8, 7, 6, 5, 4, 3, 2]



In [ ]:



In [45]:



In [52]:

    
lst = [0,1,2,3,4,5,6,7]

del lst[-1]
print lst


lst[-2:] = [0,0]
print lst


lst[-2:] = [1]
print lst









    



[0, 1, 2, 3, 4, 5, 6]
[0, 1, 2, 3, 4, 0, 0]
[0, 1, 2, 3, 4, 1]



In [53]:

    
s1 = "abcde123"



In [54]:

    
import StringIO



In [55]:

    
so = StringIO.StringIO()



In [56]:

    
so.write("abc)")



In [59]:

    
import cStringIO as StringIO
so = StringIO.StringIO()



In [ ]:

    
"%s = %s "



In [61]:

    
print "{1}={0} {1}".format("k","v",123)









    



v=k v



In [62]:

    
print "%s=%s %s" % ("k","v","k")









    



k=v k



In [63]:

    
print "{k1}={k2}".format(k1=1,k2=2)

1=2



In [64]:

    
print "%s" % "123321"



In [70]:

    
class MyObj(obj):
    pass


obj = MyObj()
obj.age =10
obj.name ="lalala"

print "{obj.age}, {obj.name}".format(obj)









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-70-3aa74c73a119> in <module>()
----> 1 class MyObj(obj):
      2     pass
      3 
      4 
      5 obj = MyObj()

TypeError: Error when calling the metaclass bases
    this constructor takes no arguments



In [77]:

    
s1 = "abc"
str(s1), repr(s1)









    Out[77]:





('abc', "'abc'")



In [75]:

    
s2 = u"abc"
str(s2), repr(s2)









    Out[75]:





('abc', "u'abc'")



In [ ]:



In [ ]:



In [78]:

    
tp = ("asdb",123,str,type,[1,3,2])



In [79]:

    
tp[1]









    Out[79]:





123



In [82]:

    
tp[2]("hello")









    Out[82]:





'hello'



In [85]:

    
st = {1,23,4, "abc"}
%timeit "abc" in st









    



10000000 loops, best of 3: 47.4 ns per loop



In [ ]:



In [86]:

    
lst = [1, 23, 4, "abc"]
%timeit "abc" in lst









    



10000000 loops, best of 3: 148 ns per loop



In [93]:

    
for x in range(0,10):
    print x



In [89]:

    
xrange(1000)









    Out[89]:





xrange(1000)



In [ ]:



In [90]:

    
%time
for x in range(10000000):
    pass









    



CPU times: user 2 µs, sys: 0 ns, total: 2 µs
Wall time: 5.01 µs



In [91]:

    
%time
for x in xrange(10000000):
    pass









    



CPU times: user 2 µs, sys: 1e+03 ns, total: 3 µs
Wall time: 7.15 µs



In [92]:

    
dct = {1:[]}



In [ ]:



In [97]:

    
lst =["abc","x",'nn']
print sorted(lst)
print sorted(lst,key=len)









    



['abc', 'nn', 'x']
['x', 'nn', 'abc']



In [ ]:



In [95]:









    Out[95]:





['abc', 'nn', 'x']



In [96]:









    Out[96]:





['x', 'nn', 'abc']



In [ ]:



In [118]:

    
dct = {"xiao":(18,"shanghai","boy"),
       "mei":(20,"nanjing","girl") ,
       "mei2":(20,"shanghai","boy") ,
       "mei3":(20,"nanjing","girl") ,
       "mei4":(20,"nanjing","girl") ,      }



In [119]:

    
lst = []
for name, info in dct.viewitems():
    if info[0] >= 20 and info[2] =="boy" and info[1] =="shanghai":
        lst.append(name)
print lst









    



['mei2']



In [120]:

    
[name
 for name, info in dct.viewitems()
 if info[0] >= 20 and info[2] =="boy" and info[1] == "shanghai"
]









    Out[120]:





['mei2']



In [ ]:



In [121]:









    



---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-121-e60602e455e4> in <module>()
----> 1 import collection

ImportError: No module named collection



In [ ]:



In [ ]:



In [ ]:



In [ ]:



In [ ]: