Numpy AttributeError float object has no attribute exp

Question

Here is my code  def sigmoid X  T        return  1 0    1 0   np exp -1 0 np dot X  T      And this line gives me error   quot AttributeError   float  object has no attribute  exp  quot   X  t are Numpy ndarray

User · Answer

You convert type np dot X  T  to float32 like this   z np array np dot X  T  dtype np float32   def sigmoid X  T       return  1 0    1 0   np exp -z      Hopefully it will finally work

User · Answer

Probably there s something wrong with the input values for X and or T  The function from the question works ok   import numpy as np from math import e  def sigmoid X  T     return 1 0    1 0   np exp -1 0   np dot X  T     X   np array   1  2  3    5  0  0    T   np array   1  2    1  1    4  4     print X dot T     Just to see if values are ok print  1     1    e    el  for el in  -5  -10  -15  -16    print   print sigmoid X  T     Result     15 16     5 10     0 9933071490757153  0 9999546021312976  0 999999694097773  0 9999998874648379      0 99999969  0 99999989     0 99330715  0 9999546      Probably it s the dtype of your input arrays  Changing X to   X   np array   1  2  3    5  0  0    dtype object    Gives   Traceback  most recent call last     File         stackoverflow sigmoid py   line 24  in  lt module gt      print sigmoid X  T    File         stackoverflow sigmoid py   line 14  in sigmoid     return 1 0    1 0   np exp -1 0   np dot X  T    AttributeError  exp

[python] Numpy AttributeError: 'float' object has no attribute 'exp'

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