### Some string function examples

#### Booleans

'555'.isalnum()
'five five five'.isalnum()
'1fiftyfive'.isalnum()
'555'.isdigit()
'555'.isnumeric()
'\u2155'.isnumeric()
'\u2155'.isdigit() ## this character does not print to my screen, but
##################### apparently is 1/5

'bug'.isidentifier()
'545'.isidentifier()
'abc'.islower()
'abc'.isupper()
'ABC'.islower()
'ABC'.isupper()
'Gone With The Wind'.istitle()
' '.isprintable()
emu = 'abc'+chr(127)
emu.isprintable()
'  '.isspace()

'Books'.endswith('es')
'Books'.endswith('s')

'Preschool'.startswith('Story Time')
'Preschool'.startswith('Pre')

##### Case Changing Functions

'hello world'.capitalize()

'hello world'.title()

'hello world'.upper()

'HELLO WORLD'.lower()

'HELLO WORLD'.title()

'Hello World'.swapcase()

#### Formatting Functions

'Hello World'.center(20,'*')

'Hello World'.ljust(20,'*')

'Hello World'.rjust(20,'*')

'{whose} {thing} is nice'.format(whose = 'John\'s', thing = 'code')


### Search Functions

'The big bad bug bled bad blood'.find('bad')
'The big bad bug bled bad blood'.rfind('bad')

'The big bad bug bled bad blood'.index('bad')
'The big bad bug bled bad blood'.rindex('bad')
## difference between find/rfind and index/rindex
## when search fails: find/rfind return -1
##       index/rindex cause an error to occur


### Stripping off characters (e.g., spaces)

'   Hello World  '.strip(' ')
'   Hello World  '.lstrip(' ')
'   Hello World  '.rstrip(' ')

### String splitting

'Five Hundred Fifty Five'.split(' ')
### rsplit searches form right (subtle difference)
'''Five hundred fifty five
Three hundred one
Seventy three'''.splitlines()
'Five Hundred Fifty Five'.partition(' ')
'Five Hundred Fifty Five'.rpartition(' ')