内置函数

title

掌握
res='你好'.encode('utf-8')
print(res)

res=bytes('你好',encoding='utf-8')
print(res)

参考ASCII表将数字转成对应的字符
print(chr(65))
print(chr(90))
参考ASCII表将字符转成对应的数字
print(ord('A'))

print(divmod(10,3))


l=['a','b','c']
for item in enumerate(l):
    print(item)

l='[1,2,3]'
l1=eval(l)
print(l1,type(l1))
print(l1[0])

with open('a.txt',encoding='utf-8') as f:
    data=f.read()
    print(data,type(data))
    dic=eval(data)
    print(dic['sex'])

print(pow(3,2,2)) # (3 ** 2) % 2

print(round(3.3))

print(sum(range(101)))


module=input('请输入你要导入的模块名>>: ').strip() #module='asdfsadf'
m=__import__(module)
print(m.time())


面向对象里的重点
classmethod
staticmethod
property

delattr
hasattr
getattr
setattr

isinstance
issubclass

object

super


了解
print(abs(-13))
print(all([1,2,3,]))
print(all([]))

print(any([0,None,'',1]))
print(any([0,None,'',0]))
print(any([]))

print(bin(3)) #11
print(oct(9)) #11
print(hex(17)) #11

print(callable(len))

import time
print(dir(time)) #列举出所有:time.名字


s=frozenset({1,2,3}) # 不可变集合
s1=set({1,2,3}) # 可变集合

a=1111111111111111111111111111111111111111111111
# print(globals())
# print(locals())
def func():
    x=222222222
    # print(globals())
    print(locals())
func()

hash([1,2,3])

def func():
    """
    文档注释
    :return:
    """
    pass

print(help(func))

l=['a','b','c','d','e']
s=slice(1,4,2)
print(l[1:4:2])
print(l[s])

print(vars())

author：Roc_Atlantis
welecome to reprint my articles
help me to modify my articles,thanks