(self-hing ai) Python string

Strings are the most commonly used data types in Python, and we can use single quotation marks (') or double quotation marks ("") to create strings.

A='hello'b="Hello"

All standard sequence operations such as (index, Shard, membership, length, minimum and maximum, etc.) are equally applicable to strings.

Formatting symbols commonly used in strings:

(%s formatted string)

Print ('hello,%s'%'World'# uses%s as a placeholder for ' world ' # Results Print (' also%s days '# uses%d as a placeholder for 10  # results #  %s can not only format strings, but also format integers

(%d formatted integer)

Print (' %d days '# uses%d as a placeholder for 10 # results

Common methods of strings:

Find (): Used to detect whether a string contains substrings of STR, you can specify a range of start and end.

 a= " hello, World   " print  (A.find ("  wo   "  6 #   Returns the index of the matching value  Span style= "COLOR: #0000ff" >print  (A.find ( " kb   " -1 #   not found, Returns-1   

 print  (A.find (  " wo  , 3)" #   Provide a starting point  6 #   result  print  (A.find ( '  WD   ", 6-1 #   result   

Print (A.find ('wo'# provides start and end # result print(A.find ( ' WD ', 3,7)# results

Lower (): Converts all uppercase characters in a string to lowercase

A='HeLlo'b=a.lower ()print# result

Upper (): Converts all lowercase characters in a string to uppercase

A='HeLlo'b=a.upper ()print#  Results

Swapcase (): Convert all lowercase characters in a string to uppercase, lowercase characters

A='HeLlo'b=a.swapcase ()print# Result 

Replace (): replaces the old string in a string with a new string

A='helloworld 'b=a.replace ('hello',' HELLO ' )print# results

Strip (): Removes the string from the Kinsoku specified character

A='++hello world++'b=a.strip ('+')Print(b) Hello world#Resultsb=a.strip ('++h')Print(b) Ello World#Resultsb=a.strip ('++d')Print(b) Hello Worl#Results

(self-hing ai) Python string