random.py 文件源码

def _test_generator(n, func, args):
    import time
    print(n, 'times', func.__name__)
    total = 0.0
    sqsum = 0.0
    smallest = 1e10
    largest = -1e10
    t0 = time.time()
    for i in range(n):
        x = func(*args)
        total += x
        sqsum = sqsum + x*x
        smallest = min(x, smallest)
        largest = max(x, largest)
    t1 = time.time()
    print(round(t1-t0, 3), 'sec,', end=' ')
    avg = total/n
    stddev = _sqrt(sqsum/n - avg*avg)
    print('avg %g, stddev %g, min %g, max %g\n' % \
              (avg, stddev, smallest, largest))