print() examples

[leodavinci1990]

print('%10s' % ('test',))

What is the purpose or difference between the having the colon after the 'text' string as in code above and without it as in code below:

print('%10s' % ('test')

The two pieces of code seem to do the same thing!

[ibreeden]

Python 3.6.9 (default, Jul 17 2020, 12:50:27) 
[GCC 8.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> type(('hallo',))
<class 'tuple'>
>>> type(('hallo'))
<class 'str'>

[Axel_Erfurt]

you can add a third one

print('%10s' % ('test',))
print('%10s' % ('test'))
print(f'{" "*5} test')

Output:
      test
      test
      test

[snippsat]

The third one that @Axel_Erfurt show can also be more elegant.

>>> print(f'{" "*5} test')
      test
>>> print(f'{"test":>10}')
      test  

So @leodavinci1990 the old string formatting %s should not be used anymore,use f-string

>>> h = 'hello'
>>> w = 'world'
>>> print(f'{h:^10}{w:>10}')
  hello        world
>>> print(f'{h:<10}{w:<10}')
hello     world     
>>> print(f'{h:^10}{w:^10}')
  hello     world   
>>> print(f'{h:>10}{w:>10}')
     hello     world

>>> # f-strings support any Python expressions inside the curly braces
>>> a, b = 5, 7
>>> f'{a}/{b} = {a/b:.2}' # limit to two decimal places 
'5/7 = 0.71'

>>> for word in 'f-strings are awesome'.split():
...     print(f'{word.upper():~^20}')
~~~~~F-STRINGS~~~~~~
~~~~~~~~ARE~~~~~~~~~
~~~~~~AWESOME~~~~~~~