python进阶_技术问答

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python进阶

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灬糖度

class Person(object):

__count = 0

def __init__(self, name):
self.name = name
Person.__count = Person.__count+1
print Person.__count

p1 = Person('Bob')
p2 = Person('Alice')

try:
print Person.__count
except AttributeError:
print "attributeerror"

0 4-7 python中类属性和实例属性名字冲突怎么办

2017-12-19

Kingscent

还不懂的看着个吧，一定会看懂的。http://www.jb51.net/article/86383.htm

3 2-12 python中编写无参数decorator

2017-12-19

user

def count():
fs = []
for i in range(1, 4):
f = lambda x: lambda : x*x
fs.append(f(i))
return fs

f1, f2, f3 = count()
print f1(), f2(), f3()

0 2-9 python中闭包

2017-12-18

user

def calc_prod(lst):

return lambda : reduce( lambda x,y:x*y , lst ,1)

f = calc_prod([1, 2, 3, 4])
print f()

1 2-8 python中返回函数

2017-12-18

随遇而安丨

lambda有点像es6的箭头函数

0 2-10 python中匿名函数

2017-12-18

user

import math

def is_sqr(x):
if math.modf(math.sqrt(x))[0]>0:
return False
else :
return True

print filter(is_sqr, range(1, 101))

浮点数用==判断你存在精度问题

1 2-6 python中filter()函数

2017-12-18

宝慕林8161040

def performance(unit):
def performan_decorator(f):
def wrapper(*args, **kw):
t = time.time()
print 'call %s() in %s %s' % (f.__name__, t, unit)
return f(*args, **kw)
return wrapper
return performan_decorator

0 2-13 python中编写带参数decorator

2017-12-18

都增刚

import math

def is_sqr(x):
return x%math.sqrt(x) == 0
print filter(is_sqr, range(1, 101))

0 2-6 python中filter()函数

2017-12-18

慕仰6980779

def format_name(s):
return s.capitalize()

print map(format_name, ['adam', 'LISA', 'barT'])

0 2-4 python中map()函数

2017-12-18

无语年华

def performance(f):
def fn(*args, **kw):
print "call " + f.__name__ + "() in",time.localtime(time.time())
return f(*args, **kw)
return fn

0 2-12 python中编写无参数decorator

2017-12-18

swxnh

class BStudent(BasketballMixin, Student):
pass

class FTeacher(FootballMixin, Teacher):
pass

s = BStudent()
print s.skill()

t = FTeacher()
print t.skill()
这样就行了。。。。。。。

0 5-5 python中多重继承

2017-12-17

swxnh

class BStudent(BasketballMixin, Student):
def __init__(self):
super(BasketballMixin, self).__init__()
super(Student, self).__init__()
class FTeacher(FootballMixin, Teacher):
def __init__(self):
super(FootballMixin, self).__init__()
super(Teacher, self).__init_

0 5-5 python中多重继承

2017-12-17

_偏偏靠才华_

答案给的不太对，将第8行代码缩进到for循环里面就通过了

1 6-4 python中 __len__

2017-12-17

慕妹2224181

太难了休息会儿，看会儿NBA 先

3 2-13 python中编写带参数decorator

2017-12-16

慕妹2224181

我只想说：what the FUCK!!!!!

0 2-13 python中编写带参数decorator

2017-12-16

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