[Tutor] IndexError: index out of bounds

[Peter Otten]

Sayan Chatterjee wrote:

> Yes, when handled as a numpy array, it's working fine!
> 
> Traceback (most recent call last):
>   File "ZA.py", line 59, in <module>
>     if temp_za == j:
> ValueError: The truth value of an array with more than one element is
> ambiguous. Use a.any() or a.all()

>From the attached script:

>    if temp_za == j:
>        counter += 1

Do you want to count the entries?

>>> temp_za = numpy.array([1, 2, 3, 2, 1, 1])
>>> (temp_za == 1).sum()
3

> This error occurs when the temp_za ( a numpy array, print temp_za works
> fine) is compared with j. I am attaching the code.

I'm sorry, I am lacking the domain knowledge to make sense of it. Just one 
more remark:

[] < 0.0

is always False, regardless of the contents of the list

 
> Another question  how do I get an integer value for  p_za / 2 . Type
> casting with int says:
> TypeError: only length-1 arrays can be converted to Python scalars.

I'd use

numpy.array(p_za//2, dtype=int)

but I'm not a numpy expert. As you dig deeper the tutor mailing list may not 
be the best place to ask -- numpy has a dedicated mailing list of its own.