Python的知识点运用-3(不太基础的基础运用，代码美化)

a = 0
b = 1
temp = a
a = b
b = temp
print(a,b)  # 1 0

a,b = b,a
print(a,b)  # 1 0

my_list = []
for i in range(10):
    my_list.append(i)
print(my_list)  # [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

my_list = [i for i in range(10)]
print(my_list)  # [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

my_list = [0,1,2,3,4,5,6,7,8,9]
for key,value in zip(range(len(my_list)),my_list):
    print(key,value)

my_list = [0,1,2,3,4,5,6,7,8,9]
for key,value in enumerate(my_list):
    print(key,value)

my_list = [0,1,2]
a,b,c = my_list
print(a,b,c)  # 0 1 2

def info():
    name,age,sex = '清安','18','男'
    return name,age,sex
a,b,c = info()
print(a,b,c)  # 清安 18 男

items = [('apple', 2), ('banana', 4), ('orange', 6)]
for fruit, num in items:
    print(f"我有{num}个{fruit}")
# 我有2个apple
# 我有4个banana
# 我有6个orange

str_ = ['Q','i','n','g','A','n']
s = ''
for i in str_:
    s+=i
print(s)

str_ = ['Q','i','n','g','A','n']
print(''.join(str_))  # QingAn

attrs = 0
if attrs == True:
    print(111)
att = 1
if att == None:
    print(222)

attrs = 0
if attrs:
    print(111)
att = 1
if not att:
    print(222)

age = 18
if age > 18:
    print("年龄超过了")
else:
    print("合适")

age = 18
info = "年龄超过了" if age > 18 else "合适"
print(info)

def info():
    j = 5
    # j = 0
    return [i for i in range(j)] or None
num = info()
print(num)

def info():
    j = 5
    # j = 0
    if j > 0:
        return [i for i in range(j)]
    else:
        return None
num = info()
print(num)