# How to count the occurrence of certain item in an ndarray in Python?

In Python, I have an ndarray `y`

that is printed as `array([0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1])`

I'm trying to count how many `0`

s and how many `1`

s are there in this array.

But when I type `y.count(0)`

or `y.count(1)`

, it says

`numpy.ndarray`

object has no attribute`count`

What should I do?

```
>>> a = numpy.array([0, 3, 0, 1, 0, 1, 2, 1, 0, 0, 0, 0, 1, 3, 4])
>>> unique, counts = numpy.unique(a, return_counts=True)
>>> dict(zip(unique, counts))
{0: 7, 1: 4, 2: 1, 3: 2, 4: 1}
```

**Non-numpy way** :

Use `collections.Counter`

;

```
>> import collections, numpy
>>> a = numpy.array([0, 3, 0, 1, 0, 1, 2, 1, 0, 0, 0, 0, 1, 3, 4])
>>> collections.Counter(a)
Counter({0: 7, 1: 4, 3: 2, 2: 1, 4: 1})
```

From: stackoverflow.com/q/28663856

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