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# mode: run
# tag: closures
# ticket: 478
__doc__ = """
>>> Num(13).is_prime()
args (Num(13),) kwds {}
True
>>> Num(13).is_prime(True)
args (Num(13), True) kwds {}
True
>>> Num(15).is_prime(print_factors=True)
args (Num(15),) kwds {'print_factors': True}
3 5
False
"""
def print_args(func):
def f(*args, **kwds):
print "args", args, "kwds", kwds
return func(*args, **kwds)
return f
cdef class Num:
cdef int n
def __init__(self, n):
self.n = n
def __repr__(self):
return "Num(%s)" % self.n
@print_args
def is_prime(self, bint print_factors=False):
if self.n == 2:
return True
elif self.n < 2:
return False
elif self.n % 2 == 0:
if print_factors:
print 2, self.n // 2
cdef int i = 3
while i*i <= self.n:
if self.n % i == 0:
if print_factors:
print i, self.n // i
return False
i += 2
return True
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