sep, end, and flush

>>> print('There are', 6, 'members of Monty Python')
There are 6 members of Monty Python
>>> message = 'There are' + 6 + 'members of Monty Python'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can only concatenate str (not "int") to str
>>> message = 'There are' + str(6) + 'members of Monty Python'
>>> print(message)
There are6members of Monty Python
>>> print('There are', 6, 'members of Monty Python', sep='😀')
There are😀6😀members of Monty Python
>>> print('There are', 6, 'members of Monty Python', sep=' ')
There are 6 members of Monty Python
>>> print('There are', 6, 'members of Monty Python', sep=None)
There are 6 members of Monty Python
>>> print('There are', 6, 'members of Monty Python', sep='')
There are6members of Monty Python
>>> print('There are', 6, 'members of Monty Python', sep='\n')
There are
6
members of Monty Python
>>> data = [ 
...     ['year', 'last', 'first'], 
...     [1943, 'Idle', 'Eric'], 
...     [1939, 'Cleese', 'John'] 
... ]
>>> for row in data:
...     print(*row, sep=',')
... 
year,last,first
1943,Idle,Eric
1939,Cleese,John

import time

def count_items(items):
    print('Counting ', end='', flush=True)
    num = 0
    for item in items:
        num += 1
        time.sleep(1)
        print('.', end='', flush=True)

    print(f'\nThere were {num} items')