有趣的python

r = [x*x for x in range(1, 11)]
print(r)	# 输出：[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

[x*x | x <- [1..10]]

# str即是表示字符串类型
def myFunc(s: str):
    # some code

b1 = True
b2 = False
o1 = b1 and b2	# False
o2 = b1 or b2	# True

exec("print('Hello World')")	# 输出：Hello World

lst = [1, 2, 3]
print(lst[-1])	# 输出3, 也要注意不能越界

lambda r, v : r + v

x, y = y, x

(x, y) = (y, x)

lst = [1, 3, 5, 7, 9, 13, 19]
for i in lst:
    if i % 2 == 0:
        print("找到了偶数")
        break
else:
    print("没有找到偶数")		# 输出：没有找到偶数

class Student(object):
    count = 0
    def __init__(self, name, score):
        self.name = name
        self.score = score
        Student.count += 1

m = Student("MMMM", 80)
print(Student.count)	# 1
print(m.name)	# MMMM

class Student(object):
    def __init__(self, name, score):
        self.__name = name
        self.__score = score

s = Student("Matthew", 60)
print(s.__name)	# 'Student' object has no attribute '__name'

class Student(object):
    pass

o = Student()
o.name = "Matthew"
print(o.name)	# 输出: Matthew

del o.name
print(o.name)	# 'Student' object has no attribute 'name'

class Student(object):
    def __getattr__(self, attr):
        if attr == 'name':
            return "Good"

o = Student()
print(o.name)	# 输出：Good

pdb.set_trace()