def func_list_empty(l = []):
l.append(2)
return l
def func_list_none(l = None):
if l == None:
l = []
l.append(2)
return l
def test_list_empty(l = []):
func_list_empty()
print func_list_empty()
func_list_none()
print func_list_none()
""" Iter, next """
class xrange_my(object):
def __init__(self, max):
self.max = max
self.b = 0
def __iter__(self):
return self
def next(self):
if self.b < self.max:
r = self.b
self.b = self.b + 1
return r
raise StopIteration()
""" Use yield, generator"""
def xrange_my_yield(max):
b = 0
while b < max:
yield b
b = b + 1
def test_yield():
for l in range(10):
print "%d," % l
print "======I'm a sperator======"
for l in xrange(10):
print "%d," % l
print "======I'm a sperator======"
for l in xrange_my(10):
print "%d," % l
print "======I'm a sperator======"
for l in xrange_my_yield(10):
print "%d," % l
def main():
test_list_empty()
test_yield()
if __name__ == "__main__" :
main()
