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itertest.py
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itertest.py
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class Data(object):
def __init__(self):
self._data=[]
def add(self,x):
self._data.append(x)
def data(self):
return iter(self._data)
#迭代器
class Data(object):
def __init__(self,*args):
self._data=list(args)
def __iter__(self):
return DataIter(self)
class DataIter(object):
def __init__(self,data):
self._index=0
self._data=data._data
def next(self):
if self._index >= len(self._data) : raise StopIteration
d=self._data[self._index]
self._index +=1
return d
#迭代器
#生成器
class Data(object):
def __init__(self,*args):
self._data=list(args)
def __iter__(self):
for x in self._data:
yield x
#生成器
#coroutine
def framework(logic):
try:
it=logic()
s=next(it)
print "logic:",s
print "logic:",s
it.send("async"+s)
except StopIteration:
pass
def logic():
s='mylogic'
r = yield s
print r
#callback回调
def framework(logic,callback):
s=logic()
print "logic:",s
print "do someting..."
callback("async"+s)
def logic():
s='mylogic'
return s
def callback(s):
print s
#异常 NameError ZeroDivisionError SyntaxError IndexError KeyError IOError AttributeError
try:
print adict[5]
except KeyError: