# ! / Usr / bin / the env to python3
# - * - Coding: UTF-. 8 - * -
# expandtabs, punctuation 20 (\ t char character characteristic similar), can be used to produce the class table.
Test = " username \ temail \ tpassword \ ncsdnak \ [email protected] \ T123 \ ntomcat \ [email protected] \ T123 \ ngithub \ [email protected] \ T123 "
V = test.expandtabs (20 is )
Print (V)
# determines whether or not a letter, man (Python is judged genuine: True / False $ 0 in the Shell: similar 0 / nonzero properties)
Test = " CSDN Ah Kun "
V = test.isalpha ()
Print (V)
# determines whether digital, isdecimal only supports decimal digital, isdigit stronger support ② decimal numbers and types of digital, isnumeric two most powerful men to support
the Test = " 2② two "
v1= Test.isdecimal ()
v2 = test.isdigit ()
v3 = test.isnumeric ()
Print (v1, v2, v3)
# of letters, numbers, underscores: identifier, def class also in line with
A = " DEF "
v = A .isidentifier ()
Print (V)
# contains non-displayable character, for example: tab \ T, newline \ n-
Test = " CSDN \ Tak "
V = test.isprintable ()
Print (V)
# determines whether or not all there is a space or not see something, for example \ n-, \ T
Test = " \ n- "
V = test.isspace ()
Print (V)
# Determine whether the title
the Test = " the Return True IF All cased characters in UPPERCASE and there are S IS "
v1 = test.istitle () # determine whether the title (headline criteria: the first letter of each word must be capitalized)
Print (v1 )
v2 = test.title () # to convert characters to the title type
Print (v2)
v3 = v2.istitle () # after the judgment was founded converted to True
Print (v3)
# the Join, string elements splicing ***** (importance level of ※)
Test = " sink like a stone iron unsold "
T = ' '
V1 = t.join (Test)
Print (V1)
V2 = " " .Join (Test)
Print (V2)
# Just (number, symbol), fill (left / right)
Test = " csdnak "
V1 = test.ljust (20 is, " * " )
Print (V1)
V2 = Test. the rjust (20 is, " . " )
Print (V2)
# zfill (number) is filled, can be filled with zeros and filling is always left (usually not) just sufficient.
V3 = test.zfill (20 is )
Print (V3)
# determined and converted lowercase
Test = " Alex "
V1 = test.lower () # all converted to lower case
V2 = v1.islower () #Determine whether all lowercase
Print (v2)
# judge capitalized and converted
v3 = test.upper () # all converted to uppercase
V4 = v3.isupper () # determine whether all capital
Print (V4)