i*****f
发帖数: 578 | 1 # method 1: a callable instance
# pros: good encapsulation
# cons: too verbal
class _func_with_static_var:
def __init__(self):
self.static_var = 0
def __call__(self, *args):
self.static_var += 1
print self.static_var
func_with_static_var = _func_with_static_var()
# method 2: pass as a list with default value
# pros: less verbal
# cons: affect the function interface
def func_with_static_var( arg1, arg2, static_var = [0] ):
static_var[0] += 1
print static_var[0]
# met | b****j
发帖数: 78 | 2 function itself is object, so:
def f():
if not hasattr(f, 'a'):
f.a = 0
f.a += 1
print f.a
【在 i*****f 的大作中提到】
: # method 1: a callable instance
: # pros: good encapsulation
: # cons: too verbal
: class _func_with_static_var:
: def __init__(self):
: self.static_var = 0
: def __call__(self, *args):
: self.static_var += 1
: print self.static_var
: func_with_static_var = _func_with_static_var()
| i*****f
发帖数: 578 | 3 oh, that's a nice one!
【在 b****j 的大作中提到】
: function itself is object, so:
: def f():
: if not hasattr(f, 'a'):
: f.a = 0
: f.a += 1
: print f.a
|
|
