mobile typing isn't scored — practice only
import time
Python · general · type the snippet below to practice
def fib(n):
a, b = 0, 1
for _ in range(n):
a, b = b, a + b
return a
about this snippet
This is the retry snippet in Python — 11 lines of real Python code that exercises common patterns you'll see in production. DeveloperType scores you on net WPM and accuracy and only counts runs above 95% accuracy on the leaderboard, so practice rewards precision, not speed alone.
view source (11 lines)
import time
def retry(fn, attempts=3, delay=0.5):
for i in range(attempts):
try:
return fn()
except Exception:
if i == attempts - 1:
raise
time.sleep(delay * (2 ** i))
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