line_profiler is actually not a package that's bundled with Python, but it's far too useful to ignore. While the regular profile module profiles all (sub)functions within a certain block, line_profiler allows for profiling line per line within a function. The Fibonacci function is not best suited here, but we can use a prime number generator instead. But first, install line_profiler:
pip install line_profiler
Now that we have installed the line_profiler module (and with that the kernprof command), let's test line_profiler:
import itertools
@profile
def primes():
n = 2
primes = set()
while True:
for p in primes:
if n % p == 0:
break
else:
primes.add(n)
yield n
n += 1
if __name__ == '__main__':
total = 0
n = 2000
for prime in itertools.islice(primes(), n):
total += prime
print('The sum of the first %d primes is %d' % (n, total))You might be wondering where the...