python面试题

面试题：

逻辑运算符：

print(1 > 2 or 3 and 4 < 6)

print(2 or 3 and 4 < 6)

 

python2x 与 python3x 的区别

 

#匿名函数
#1.求结果
v = [lambda :x for x in range(10)]
print(v)
print(v[0])
print(v[0]())

#2.求结果
v = (lambda :x for x in range(10))
print(v)
print(v[0])
print(v[0]())
print(next(v))
print(next(v)())

 

# 面向对象特性之继承--面试题
class Foo:
    def __init__(self):
        self.func()
    def func(self):
        print('in Foo')

class Son(Foo):
    def func(self):
        print('in Son')

s1 = Son()

##################
class Foo:
    Country = 'China'
    def func(self):
        print(self.Country)

class Son(Foo):
    Country = 'English'
    def func(self):     # 走这个方法
        print(self.Country)

s = Son()
s.func()

####################
class Foo:
    Country = 'China'
    def func(self):  # 走这个方法
        print(self.Country)

class Son(Foo):
    Country = 'English'

s = Son()
s.func()   # English

#########################
class Foo:
    Country = 'China'
    def func(self):
        print(self.Country)

class Son(Foo):pass

s = Son()
s.func()   # 'China'

 

#python中...等于pass
s = ['a','b','c']
for i in s:
    if i == 'a':
        ...
    else:
        print(i)

 

#数学的算法---》牛顿偏离法
sum = 1.2 - 1.0

if sum == 0.2:
    while True:
        print('1')
else:
    print('2')