Python string magic four

test = "sadaddd Zhenxian" # identifies whether all letters 
V = Test. the isalpha () 
Print (V) 


Test = "②123 two" # identifying whether it is currently a digital 
V1 = Test. isdecimal () # decimal 
Print (V1) 
V2 the Test =. isdigit () # ② contains symbols 
Print (v2) 
v3 = the Test. IsNumeric () # include Chinese digital 
Print (v3) 

the Test = "ALEX" case conversion # 
v = the Test. swapcase () 
Print (v) 

# letters, numbers, underscores: calss identifier DEF 
a = "kkk_123" # is an identifier to identify whether 
V = a. isIdentifier () 
Print (V) 

Test = "jdiad \ TAD" # whether there is non-displayed character # \ t Ltd. table symbol # \ n newline 
V = Test. isPrintable ()
print (v) 

the Test = "" # judge whether all spaces 
v = the Test. isspace () 
print (v) 

the Test = "TUDUDUDUDU" 
v = the Test. istitle () # determine whether the title (title) = uppercase letter 
print (v) 
v1 = the Test. title () # to help you change the title format 
Print (v1) 

the Test = "you are the wind I am the sand" # string each element spliced in accordance with the specified delimiter 
Print (the Test) 
t = "_" 
v = t. the Join (the Test) 
Print (v) 

the Test = "alex" # character on the left of 
v = the Test. ljust (20, "*") 
Print (v) 

the Test = "alex" to # characters on the right 
v = the Test. rjust (20, "*") 
Print (v) 

the Test = "alex "# pad character
Test = V. zfill (10) 
Print (V) 

# determines whether all of the case and the case is converted to 
Test = "Alex" 
V1 = Test. islower () 
V2 = Test. casefold () 
Print (V1, V2) 

Test = "Alex" 
V1 = Test. isupper () 
V2 = Test. Upper () 
Print (V1, V2)