python - How to find the index of an array inside a list -

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Assume that you have an array list and then you specify separately (which is also present inside the list ). How can you get an indicator? 

 In  [185]: y_train.index (Y_test [0]) ------------------- ------- ------------------------------------------- ------ Manor Tracebacks (Last Call Last) & lt; Ipython-input-185-c9084f698632 & gt; In & lt; Module & gt; () ---- & gt; 1 y_train.index (Y_test [0]) Value error: The truth value of an array with more than one element is ambiguous. Use A.any () or a.all ()

, y_train is a 'big' list that contains everything, and Y_test [ 0] is one of its elements 

  In the category I (0, Lane (Y_train): For range in J (0, Lane (Y_test)): If y_train [i] .shape == Y_test [j] .shape: v = y_train [i] == Y_test [j] if v .all (): Print ('I', I) Print ('J', J)

It is indexed that I am after that. The error has come from the fact that it is not clear what should be the truth when working with the arrays of many elements


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