<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def isclose(a, b, rtol=1e-5, atol=1e-8):
 """This is essentially np.isclose, but slightly faster."""

    return abs(a - b) < (atol + rtol * abs(b))