Build-in Function:abs(),all(),any(),assii(),bin(),issubclass(),bytearray(),isinstance()

print('abs()：输出绝对值，是absolute的缩写--------------')
print(abs(-1))
 
print('all()与any()---------------------------')
#all都为真时才为真，但是空的为真，any()有一个为真时就是真的
jo1_list=[1,2,3,4,5,6,7]
jo2_list=['',2,3,4,5,7]
jo4_list=[0,2,3,4,5,6,7]
jo5_list=[False,2,3,4,5,6,7]
jo6_list=[]
jo7_list=[0,'',False]
print('all()列表元素不为空和零',all(jo1_list))
print('all()列表元素包含一个空',all(jo2_list))
print('all()列表元素包含一个0',all(jo4_list))
print('all()列表元素包含一个False',all(jo5_list))
print('all()列表元素为空',all(jo6_list))
print('all()列表元素为空、零和假',all(jo7_list))
 
print('any()列表元素不为空和零',any(jo1_list))
print('any()列表元素包含一个空',any(jo2_list))
print('any()列表元素包含一个0',any(jo4_list))
print('any()列表元素包含一个False',any(jo5_list))
print('any()列表元素为空',any(jo6_list))
print('all()列表元素为空、零和假',any(jo7_list))
 
print('ascii()-----------------------')
print('参数为数字，返回字符串',ascii(10))
print('参数为字符串，返回字符串',ascii('jojojo'))
print('参数为汉字，返回字符串',ascii('呵呵哒'))
 
print('bin()是binary的缩写--------------------------')
print(bin(1))
print(bin(10000**1000))
 
print('bool()---------')
print(bool())
print(bool(0))
print(bool(1))
print(bool(2))
 
print('issubclass()---')
class jo:
    pass
class joo(jo):
    pass
class jook:
    pass
print(issubclass(joo,jo))
print(issubclass(jook,jo))

>>>> bytearray('heheda')
Traceback (most recent call last):
  File "<pyshell#28>", line 1, in <module>
    bytearray('heheda')
TypeError: string argument without an encoding
>>> bytearray(heheda)
Traceback (most recent call last):
  File "<pyshell#29>", line 1, in <module>
    bytearray(heheda)
NameError: name 'heheda' is not defined
>>> bytearray('heheda',''utf-8)
SyntaxError: invalid syntax
>>> bytearray('heheda','utf-8')
bytearray(b'heheda')
>>> bytearray('heheda','gb2312')
bytearray(b'heheda')
>>> bytearray('heheda','BIG5')
bytearray(b'heheda')
>>> bytearray('呵呵哒','BIG5')
Traceback (most recent call last):
  File "<pyshell#34>", line 1, in <module>
    bytearray('呵呵哒','BIG5')
UnicodeEncodeError: 'big5' codec can't encode character '\u54d2' in position 2: illegal multibyte sequence
>>> bytearray('呵呵哒','gb2312')
bytearray(b'\xba\xc7\xba\xc7\xdf\xd5')
>>> bytearray('呵呵哒','utf-8')
bytearray(b'\xe5\x91\xb5\xe5\x91\xb5\xe5\x93\x92')
>>> is
SyntaxError: invalid syntax
>>> isinstance(jojo,str)
Traceback (most recent call last):
  File "<pyshell#38>", line 1, in <module>
    isinstance(jojo,str)
NameError: name 'jojo' is not defined
>>> isinstance('jojo',str)
True
>>> isinstance('jojo',unicode)
Traceback (most recent call last):
  File "<pyshell#40>", line 1, in <module>
    isinstance('jojo',unicode)
NameError: name 'unicode' is not defined
>>> isinstance('jojo','utf-8')
Traceback (most recent call last):
  File "<pyshell#41>", line 1, in <module>
    isinstance('jojo','utf-8')
TypeError: isinstance() arg 2 must be a type or tuple of types
>>> isinstance('jojo','utf-8')