#abs()取绝对值

'''

all(iterable)

Return True if all elements of the iterable are true (or if the iterable is empty).

'''

print(all([0,9,-8,'a']))

print(all([9,-8,'a']))

'''

any(iterable)

Return True if any element of the iterable is true. If the iterable is empty, return False.

'''

print(any([0,9,-8,'a']))

print(any([]))

# ascii(object)

# As repr(), return a string containing a printable representation of an object,

# but escape the non-ASCII characters in the string returned by repr() using \x, \u or \U escapes.

a=ascii(['a',1,'汉子'])

print(a,[a])

print(type(a))#格式是字符串

'''

bin(x)

Convert an integer number to a binary string prefixed with “0b”.

'''

print(bin(3))

#布尔bool

print(bool(0))

print(bool(1))

print(bool([]))

#byte

a=bytes('abc',encoding='utf-8')

print(a.capitalize(),a)#字符串不可以修改，二进制的字节格式也不可以修改，要想修改只能生成新的

#bytearray字节的数组可以被修改

b=bytearray('abc',encoding='utf-8')

print(b[0],b[2])

#b[0]='B'#错误。必须以字节形式修改

b[0]=65

b[1]=66

b[2]=67

print(b)

'''

callable(object)判断是否可以被调用

'''

print(callable([]))

def diaoyong():pass

print(callable(diaoyong))#函数和类都可调用

# chr(i),i必须是数字，将数字转为ascll码字符

print(chr(67))

#ord与chr相反

print(ord('C'))

#compile()

code1='for i in range(10):print(i)'

exec(code1)#以下两行程序同等此行

# c=compile(code1,'','exec')#exec将字符串编码可执行的程序

# exec(c)

#print(c)，c是内存中的数据对象

code2='1+3/2*6'

print(eval(code2)) #以下两行程序同等此行

'''

c=compile(code2,'','eval')

eval(c)#,适合字符串变字典，以及加减乘除类，不适合语句类，比如for循环，这样的用exec

'''

code3='''

import time

def consumer(name):

    print("%s 准备吃包子啦!" %name)

    while True:

       baozi = yield

       print("包子[%s]来了,被[%s]吃了!" %(baozi,name))

c=consumer('猪小芳')

c.__next__()

b1='韭菜馅'

'''

exec(code3)#以下两行程序同等此行

# py_obj=compile(code3,'err.log','exec')#编译过程中出的错会写到err.log中，写不写无所谓，不好使

# exec(py_obj)

#complex复数

print(complex('1+2j')+complex('2+2j'))

#dict字典

print(dict())#生成字典

#dir查看使用方法

a={}

b=()

print(dir(a))

print(dir(b))

#divmod(a,b),return商和余数

print(divmod(6,4))

#匿名函数,用完就释放

(lambda n:print(n*n))(5)#一种传递参数的方法

calc=lambda n:print(n*n)

calc(10)

# calc2=lambda x:for i in range(x):print(i)#处理不了复杂的,可以处理三元运算这种简单的

calc3=lambda n:3 if n<4 else n

print(calc3(5))

#lambda可与filter过滤器结合使用

res=filter(lambda n:n>5,range(10))

print(res)#迭代器

for i in res:

    print(i,end='\t')

print('>>>>>>>>>分隔符1')

#lambda可与map结合使用

res=map(lambda n:n*2,range(10))#等价于[i*2 for i in range(10)],[lambda n:n*2 for i in range(10)]

print(res)#迭代器

for i in res:

    print(i,end='\t')

print('>>>>>>>>>分隔符1')

import functools

print(functools.reduce(lambda x,y:x*y,range(1,10)))#阶乘

print(functools.reduce(lambda x,y:x+y,range(10)))#累加和

#不可变集合,就和元组似的

a=frozenset([1,4,333,212,33,33,12,4])

print(a)

#返回本文件程序的所有全局变量及值

print(globals())

'''

hash(object)哈希：每个数据对应一个数字映射，便于查找

Return the hash value of the object (if it has one).Hash values are integers.

They are used to quickly compare dictionary keys during a dictionary lookup.

Numeric values that compare equal have the same hash value

(even if they are of different types, as is the case for 1 and 1.0).

'''

print(hash('熊羚羽'))

print(hash('韩江桦'))

print(hash('俞莎莎'))

print(hash('熊羚羽'))#与第一个对应的映射是相同的