Why does time.sleep work with print(“=”), but not with print(“=”, end=””)?

I just started with Python and this problem just doesnt make first glace sense: I want to make a line appear with some sort of animation. The first code (1) works well, but doenst output the ==== line i want. The second one (2) instantly prints ==== after waiting for all the timers to finish…:

Am i missing something?

#first

import time
for x in range(10):
    print("=")
    time.sleep(0.2)

#second

import time
for x in range(10):
    print("=", end="")
    time.sleep(0.2)

The first one output:

=

=

=

With expected 0.2seconds delay but each = in a new line

the second one outputs:

======

after waiting for 2 seconds

Expected:

=====

with a .2 delay between each “=”

Nevermind, i figured it out a workaround:

for x in range(10):
    print("="*x, end="r")
    time.sleep(0.1)

The better solution:

for x in range(10):
    print("="*x, end="r")
    sys.stdout.flush()
    time.sleep(0.1)

# Or

for x in range(10):
    print("="*x, end="r", flush=True)
    time.sleep(0.1)