teeny changes (#1589)

* teeny changes

* import order

tinygrad/tensor.py

@@ -1,13 +1,13 @@
 # inspired by https://github.com/karpathy/micrograd/blob/master/micrograd/engine.py
 from __future__ import annotations
-import time
+import time, operator
 from functools import partialmethod, reduce
 from itertools import accumulate, filterfalse
-import operator
 import numpy as np
 from typing import List, Tuple, Callable, Optional, ClassVar, Type, Union, Sequence, cast
-from tinygrad.helpers import ImageDType, argfix, make_pair, getenv, IMAGE, DEBUG, flatten, DType, dtypes
 from math import ceil, pi, prod, sqrt, log, cos, copysign, isinf
+
+from tinygrad.helpers import ImageDType, argfix, make_pair, getenv, IMAGE, DEBUG, flatten, DType, dtypes
 from tinygrad.lazy import Device, LazyBuffer
 from tinygrad.ops import LoadOps
 
@@ -604,6 +604,7 @@ class Tensor:
       if x == 2.0: return self*self
       if x == 1.0: return self
       if x == 0.5: return self.sqrt()
+    if not isinstance(x, Tensor) and reverse and x > 0: return self.mul(log(x)).exp()
     ar = self.abs().log().mul(x).exp() if not reverse or isinstance(x, Tensor) else self.mul(log(abs(x))).exp()
     # correct sign of negative numbers raised to a power (cos has a period of 2pi so we use it here to get the oddness of the power)
     sign = (x * pi).cos() if isinstance(x, Tensor) else cos(x * pi) if not reverse else (self * pi).cos()