Magic Day10 for Python strings

Capitalize first letter

" Alex "  = test.capitalize ()print(v)

All lowercase, the first is a lot better, many unknown correspondence can be changed to lowercase

Test/casefold ()

Test.lower ()

Set the width, and put the text in the middle, 20, for total length, and X for blank padding

" ALEX "  =test.center ("x")print(v)

Calculates the number of elements in the current text count,a represents the found element, 5, 6 for the beginning and end

" Alexaler "  =test.count ("a", 5,6)print(v)

Whether to end with what Shartwith start with what

" Alexaler "  =test.endswith ("a")print(v)

Find a character in the string position, get the first position, regardless, 5,8 indicates from where to, to find must be greater than the location, can not find the same -1,index function, but can not find an error

" Alexaler "  =test.find ("R", 5,8)print(v)

formatting, replacing placeholders in strings with established values

 test =  al{ex}al{ex}  " 
 #括号可替换为0, 
  #下面则不用ex =, write directly rprint   (test) v  =test.format (ex="  r   " )  print  (v) 

" Al{0}al{1} " # brackets can be replaced by 0,1,2 # The following is not ex=, write directly R Print  =test.format ("R","D")  Print(v)

Determines whether the string contains only letters and numbers

" uasf890+ "  = test.isalnum ()print(v)

Magic Day10 for Python strings