Các phương thức chuỗi trong Python?

>>> mystring ="hello python">>> print (mystring.capitalize ()) Xin chào python 

>>> mystring ="hello PYTHON">>> print (mystring.casefold ()) xin chào python 

>>> mystring ="Xin chào">>> x =mystring.center (12, "-")>>> print (x) --- Xin chào ---- 

>>> mystr ="Xin chào Python">>> print (mystr.count ("o")) 2>>> print (mystr.count ("th")) 1>>> print ( mystr.count ("l")) 2>>> print (mystr.count ("h")) 1>>> print (mystr.count ("H")) 1>>> print (mystr.count (" hH ")) 0 

• nghiêm ngặt (lỗi mã hóa tạo ra một UnicodeError)

• bỏ qua

• thay thế

• xmlcharrefreplace

• dấu gạch chéo ngược

• bất kỳ tên nào khác được đăng ký qua codecs.register_error ()

>>> mystr ='python!'>>> print ('Chuỗi là:', mystr) Chuỗi là:python!>>> print ('Bản mã hóa là:', mystr.encode ("ascii", "ignore")) Phiên bản được mã hóa là:b'python! '>>> print (' Phiên bản được mã hóa (với thay thế) là:', mystr.encode ("ascii", "Replace")) phiên bản được mã hóa (withreplace) là:b'python! '

>>> mystr ="Python">>> print (mystr.endswith ("y")) Sai>>> print (mystr.endswith ("hon")) Đúng 

>>> mystr ="1 \ t2 \ t3">>> print (mystr) 1 2 3>>> print (mystr.expandtabs ()) 1 2 3>>> print (mystr.expandtabs (tabsize =15)) 1 23>>> print (mystr.expandtabs (tabsize =2)) 1 2 3 

>>> mystring ="Python">>> print (mystring.find ("P")) 0>>> print (mystring.find ("on")) 4 

>>> print ("{} và {}". format ("Apple", "Banana")) Apple and Banana>>> print ("{1} và {0}". format ( "Apple", "Banana")) Chuối và táo>>> print ("{bữa trưa} và {bữa tối}". Định dạng (bữa trưa ="Đậu Hà Lan", bữa tối ="Đậu")) Đậu Hà Lan và Đậu 

>>> bữa trưa ={"Thức ăn":"Pizza", "Thức uống":"Rượu"}>>> print ("Bữa trưa:{Thức ăn}, {Thức uống}". format_map (bữa trưa)) Bữa trưa:Pizza, Rượu>>> lớp Mặc định (dict):def __missing __ (self, key):quay lại khóa>>> bữa trưa ={"Uống":"Rượu"}>>> print ("Bữa trưa:{Thức ăn}, {Drink} ". Format_map (Mặc định (ăn trưa))) Bữa trưa:Thức ăn, Rượu 

>>> mystr ="HelloPython">>> print (mystr.index ("P")) 5>>> print (mystr.index ("hon")) 8>>> print (mystr .index ("o")) 4 

>>> mystr ="HelloPython">>> print (mystr.isalnum ()) Đúng>>> a ="123">>> print (a.isalnum ()) Đúng>>> a ="$ *% !!!">>> print (a.isalnum ()) Sai 

>>> mystr ="HelloPython">>> print (mystr.isalpha ()) Đúng>>> a ="123">>> print (a.isalpha ()) Sai>>> a ="$ *% !!!">>> print (a.isalpha ()) Sai 

>>> mystr ="HelloPython">>> print (mystr.isdecimal ()) Sai>>> a ="1.23">>> print (a.isdecimal ()) Sai>>> c =u "\ u00B2">>> print (c.isdecimal ()) Sai>>> c ="133">>> print (c.isdecimal ()) Đúng 

>>> c ="133">>> print (c.isdigit ()) True>>> c =u "\ u00B2">>> print (c.isdigit ()) True>>> a ="1.23">>> print (a.isdigit ()) Sai 

>>> c ="133">>> print (c.isidentifier ()) Sai>>> c ="_ user_123">>> print (c.isidentifier ()) Đúng>>> c ="Python">>> print (c.isidentifier ()) Đúng 

>>> c ="Python">>> print (c.islower ()) False>>> c ="_ user_123">>> print (c.islower ()) True>>> print (c.islower ()) Sai 

>>> c ="133">>> print (c.isnumeric ()) True>>> c ="_ user_123">>> print (c.isnumeric ()) Sai>>> c ="Python">>> print (c.isnumeric ()) Sai 

>>> c ="133">>> print (c.isprintable ()) True>>> c ="_ user_123">>> print (c.isprintable ()) True>>> c ="\ t">>> print (c.isprintable ()) Sai 

>>> c ="133">>> print (c.isspace ()) False>>> c ="Hello Python">>> print (c.isspace ()) False73>>> c ="Xin chào">>> print (c.isspace ()) Sai>>> c ="\ t">>> print (c.isspace ()) Đúng 

>>> c ="133">>> print (c.istitle ()) Sai>>> c ="Python">>> print (c.istitle ()) Đúng>>> c ="\ t">>> print (c.istitle ()) Sai 

>>> c ="Python">>> print (c.isupper ()) Sai>>> c ="PYHTON">>> print (c.isupper ()) Đúng>>> c ="\ t">>> print (c.isupper ()) Sai 

>>> a ="-">>> print (a.join ("123")) 1-2-3>>> a ="Xin chào Python">>> a ="** ">>> print (a.join (" HelloPython ")) H ** e ** l ** l ** o **** P ** y ** t ** h ** o ** n  

>>> a ="Xin chào">>> b =a.ljust (12, "_")>>> print (b) Xin chào _______ 

>>> a ="Python">>> print (a.lower ()) Python 

>>> a ="Xin chào">>> print (a.lstrip (), "!") Xin chào 

>>> frm ="SecretCode">>> to ="4203040540">>> trans_table =str.maketrans (frm, to)>>> sec_code ="SecretCode" .translate (trans_table)>>> print (sec_code) 400304 0540 

>>> mystr ="Hello-Python">>> print (mystr.partition ("-")) ('Xin chào', '-', 'Python') 74>>> print (mystr .partition (".")) ('Hello-Python', '', '') 

>>> mystr ="Xin chào Python. Xin chào Java. Xin chào C ++.">>> print (mystr.replace ("Xin chào", "Tạm biệt")) Tạm biệt Python. Tạm biệt Java. ByeC ++.>>> print (mystr.replace ("Xin chào", "Địa ngục", 2)) Hell Python. Hell Java. Xin chào C ++. 

>>> mystr ="Hello-Python">>> print (mystr.rfind ("P")) 6>>> print (mystr.rfind ("-")) 5>>> print (mystr.rfind ("z")) - 1 

>>> mystr ="Hello-Python">>> print (mystr.rindex ("P")) 6>>> print (mystr.rindex ("-")) 5>>> print (mystr.rindex ("z")) Traceback (calllast gần đây nhất):Tệp "", line1, in  print (mystr.rindex ("z")) ValueError:substring notfound 

>>> mystr ="Xin chào Python">>> mystr1 =mystr.rjust (20, "-")>>> print (mystr1) -------- Xin chào Python 

>>> mystr ="Xin chào Python">>> print (mystr.rpartition (".")) ('', '', 'Xin chào Python')>>> print (mystr.rpartition ( "")) ('Xin chào', '', 'Python') 

>>> mystr ="Xin chào Python">>> print (mystr.rsplit ()) ['Xin chào', 'Python']>>> mystr ="Xin chào-Python-Xin chào">>> print (mystr.rsplit (sep ="-", maxsplit =1)) ['Hello-Python', 'Hello'] 

>>> mystr ="Xin chào Python">>> print (mystr.rstrip (), "!") Xin chào Python!>>> mystr ="----------- -Chào Python ----------- ">>> print (mystr.rstrip ()," - ") ------------ Xin chào Python ------ ----- ->>> print (mystr.rstrip (), "_") ------------ Xin chào Python ----------- _ 

>>> mystr ="Xin chào Python">>> print (mystr.split ()) ['Xin chào', 'Python']>>> mystr1 ="Xin chào, Python">>> print (mystr1.split (",")) ['Xin chào', '', 'Python'] 

>>> mystr ="Xin chào:\ n \ nPython \ r \ nJava \ nC ++ \ n">>> print (mystr.splitlines ()) ['Xin chào:', '', 'Python' , 'Java', 'C ++']>>> print (mystr.splitlines (keepends =True)) ['Xin chào:\ n', '\ n', 'Python \ r \ n', 'Java \ n', 'C ++ \ n'] 

>>> mystr ="Xin chào Python">>> print (mystr.startswith ("P")) Sai>>> print (mystr.startswith ("H")) Đúng>>> print ( mystr.startswith ("Địa ngục")) Đúng 

>>> mystr ="Xin chào Python">>> print (mystr.strip (), "!") Xin chào Python!>>> print (mystr.strip (), "") Xin chào Python 

>>> mystr ="Xin chào PYthon">>> print (mystr.swapcase ()) hELLO python 

>>> mystr ="Hello PYthon">>> print (mystr.title ()) Xin chào Python>>> mystr ="HELLO JAVA">>> print (mystr.title ()) Xin chào Java 

>>> frm ="helloPython">>> to ="40250666333">>> trans_table =str.maketrans (frm, to)>>> secret_code ="SecretCode" .translate (trans_table)>>> print (secret_code) S0cr06 C3d0 

>>> mystr ="hello Python">>> print (mystr.upper ()) HELLO PYTHON 

>>> mystr ="999">>> print (mystr.zfill (9)) 000000999>>> mystr ="-40">>> print (mystr.zfill (5)) - 0040