Build-in Function:abs(),all(),any(),assii(),bin(),issubclass
发布时间:2020-12-14 04:47:35 所属栏目:大数据 来源:网络整理
导读: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 =[ ‘
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=[‘‘,7] jo4_list=[0,7] jo5_list=[False,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>",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>",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‘xbaxc7xbaxc7xdfxd5‘) >>> bytearray(‘呵呵哒‘,‘utf-8‘) bytearray(b‘xe5x91xb5xe5x91xb5xe5x93x92‘) >>> is SyntaxError: invalid syntax >>> isinstance(jojo,str) Traceback (most recent call last): File "<pyshell#38>",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>",in <module> isinstance(‘jojo‘,unicode) NameError: name ‘unicode‘ is not defined >>> isinstance(‘jojo‘,‘utf-8‘) Traceback (most recent call last): File "<pyshell#41>",‘utf-8‘) TypeError: isinstance() arg 2 must be a type or tuple of types >>> isinstance(‘jojo‘,‘utf-8‘) (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |