[Python] Slow printing using time.sleep function

I want to print characters of a string slowly on the terminal on the same line using python3. i used this code.

for i in "Hello":
print(i,end='')
time.sleep(0.2)


this code waits for 0.2 * 5(len of "Hello") secs and prints all the characters at once.when i use sys.stdout.write() function instead of print function, it prints the characters line by line instead of same line. how do i print characters on same line with delay?

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