Fall-back from the nopython compilation path to the object mode compilation

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出现此提示的原因是用@jit标注的函数内存在非数值运算语句。

比如下例中，time()函数和print()函数都不能出现在foo()函数中。正确写法为：

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import numba as nb
import time
 
@nb.jit
def foo(x, y):
	s = 0
	for i in range(x, y):
		s += i
	return s
 
tt = time.time()
print(foo(1, 100000000))
print('Time used: {} secs'.format(time.time() - tt))