gistfile1.py

import os, time
def list_modules(path):
    for name in os.listdir(path):
        base, ext = os.path.splitext(name)
        if '.' in base or base.startswith('__'):
            continue
        if ext == '.py':
            yield base
        elif not ext:
            if not os.path.exists(os.path.join(base, '__init__.py')):
                continue
            yield base

c1 = time.time()
n = 0
for mod in list_modules('/usr/local/lib/python3.2'):
    n += 1
    __import__(mod)
c2 = time.time()
print('{} modules imported in {} seconds'.format(n, c2 - c1))