clean up

Author: junpenglao

pymc3/math.py

@@ -197,7 +197,7 @@ def invlogit(x, eps=sys.float_info.epsilon):
 def logbern(log_p):
     if np.isnan(log_p):
         raise FloatingPointError("log_p can't be nan.")
-    return np.log(nr.uniform()) < log_p
+    return np.log(np.random.uniform()) < log_p
 
 
 def logit(p):

pymc3/step_methods/hmc/nuts.py

@@ -15,7 +15,6 @@
 from collections import namedtuple
 
 import numpy as np
-import numpy.random as nr
 
 from ..arraystep import Competence
 from .base_hmc import BaseHMC, HMCStepData, DivergenceInfo