Python Learning Notes (iv) string and string manipulation

String

Strings can be stored in any type of string, such as a name, a sentence, and so on.

Strings also have many built-in methods for manipulating strings, often in the following ways:

1name1='Hello World'2 Print(Name.capitalize ())#Capitalize first letter3 Print(Name1.capitalize ())#Write letter uppercase Hello world4 Print(Name1.center (50,'-'))#50-, put name1 in the middle-------------------Hello World--------------------5 Print(Name.endswith ('u'))#whether to end with X False6 Print(Name1.endswith ('D'))#whether to end with X True7 Print(Name.expandtabs (30))#the number of times that the \ t was filled in my name is {name},age is{age}.8 Print(Name1.find ('N'))#find the index of the string 5 (\ t represents 3 characters)9 Print(Name.format (name='Niuniu', age=18))#This is the format string my name is Niuniu,age is18.Ten Print(Name.format_map ({'name':'Niuniu',' Age': 19}))#This is also the format of the string, followed by a dictionary, the dictionary will be written in the back One #My name is Niuniu,age is19. A Print('abA123'. Isalnum ())#Whether it contains numbers and letters True - Print('AbA'. Isalpha ())#is there an English letter true

1Name ='My \ t name is {name},age is{age}.'2 Print('122'. IsDigit ())#whether there is a number true3 Print('AA'. Isidentifier ())#is a valid variable name true4 Print('AA'. Islower ())#whether it is a lowercase letter true5 Print('AA'. Isupper ())#is the uppercase letter true6 Print('LoadRunner Book'. Istitle ())#is not a title that determines whether the first letter is capitalized true7 Print('+'. Join (['hehe','haha','ee']))#Stitching String Hehe+haha+ee8 Print(Name.lower ())#becomes lowercase my name is {name},age is{age}.9 Print(Name.upper ())#becomes uppercase my NAME is {name},age is{age}.Ten Print('\nmysql \ n'. Lstrip ())#by default, the left space and line breaks are removed One Print('\nmysql \ n'. Rstrip ())#by default, the right space and line breaks are removed A Print('\nmysql \ n'. Strip ())#by default, both spaces and line breaks are removed -P=str.maketrans ('ABCDEFG','1234567')#the preceding string and the following string do the mapping - Print('CC AE GG'. Translate (p))#the output is mapped in accordance with the above Maketrans string .

1New_p=str.maketrans ('1234567','ABCDEFG')2 Print('CC AE GG'. Translate (new_p))3 Print('MySQL is db.'. replace ('MySQL','Oracle', 1))#Replace the string Oracle is DB.4 Print('MySQL is db.mysql are Db.mysql is db.'. replace ('MySQL','Oracle', 2))#Replacement String Oracle is Db.oracle are Db.mysql is db.5 Print('MySQL is an IS db'. RFind (' is'))#returns the subscript of the rightmost character 96 Print('1+2+3+4'. Split ('+'))#cut string, return a list [' 1 ', ' 2 ', ' 3 ', ' 4 ']7 Print('1+2+3\n1+2+3+4'. Splitlines ())#split by line break [' 1+2+3 ', ' 1+2+3+4 ']8 Print('Abcdef'. Swapcase ())#Case Reversal ABCdef

Python Learning Notes (iv) string and string manipulation