有趣的python

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

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

# str即是表示字串型別
def myFunc(s: str):
# some code

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

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

lst = [1, 2, 3]
print(lst[-1])# 輸出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("找到了偶數")
break
else:
print("沒有找到偶數")# 輸出：沒有找到偶數

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)# 輸出: 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)# 輸出：Good

pdb.set_trace()