AttributeError numpy ndarray object has no attribute append

Question

I am trying to run the code presented on the second page   http   ocw mit edu courses electrical-engineering-and-computer-science 6-00-introduction-to-computer-science-and-programming-fall-2008 video-lectures lecture-20 lec20 pdf  At the bottom of the code you have to add these lines   simFlips 100 100   show     Here is the error that I get when I run it on ubuntu   Traceback  most recent call last     File  coin py   line 36  in  lt module gt      simFlips 100 100    File  coin py   line 16  in simFlips     diffs append abs heads - tails   AttributeError   numpy ndarray  object has no attribute  append    Please tell me what I m doing wrong that gives me the last error   Thanks in advance

User · Answer

I got this error after change a loop in my program, let`s see:

for ...
  for ... 
     x_batch.append(one_hot(int_word, vocab_size))
     y_batch.append(one_hot(int_nb, vocab_size, value))
  ...
  ...
  if ...
        x_batch = np.asarray(x_batch)
        y_batch = np.asarray(y_batch)
...

In fact, I was reusing the variable and forgot to reset them inside the external loop, like the comment of John Lyon:

for ...
  x_batch = []
  y_batch = []
  for ... 
     x_batch.append(one_hot(int_word, vocab_size))
     y_batch.append(one_hot(int_nb, vocab_size, value))
  ...
  ...
  if ...
        x_batch = np.asarray(x_batch)
        y_batch = np.asarray(y_batch)
...

Then, check if you are using np.asarray() or something like that.

User · Answer

Use numpy concatenate list1   list2  or numpy append   Look into the thread at Append a NumPy array to a NumPy array

[python] AttributeError: 'numpy.ndarray' object has no attribute 'append'

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