# How to get the indices list of all NaN value in numpy array?

Hello Guys, How are you all? Hope You all Are Fine. Today We Are Going To learn about How to get the indices list of all NaN value in numpy array in Python. So Here I am Explain to you all the possible Methods here.

## How to get the indices list of all NaN value in numpy array?

1. How to get the indices list of all NaN value in numpy array?

You can use `np.where` to match the boolean conditions corresponding to `Nan` values of the array and `map` each outcome to generate a list of `tuples`.

2. get the indices list of all NaN value in numpy array

You can use `np.where` to match the boolean conditions corresponding to `Nan` values of the array and `map` each outcome to generate a list of `tuples`.

## Method 1

np.isnan combined with np.argwhere

```x = np.array([[1,2,3,4],
[2,3,np.nan,5],
[np.nan,5,2,3]])
np.argwhere(np.isnan(x))
```

output:

```array([[1, 2],
[2, 0]])```

## Method 2

You can use `np.where` to match the boolean conditions corresponding to `Nan` values of the array and `map` each outcome to generate a list of `tuples`.

```>>>list(map(tuple, np.where(np.isnan(x))))
[(1, 2), (2, 0)]```

## Summery

It’s all About this issue. Hope all Methods helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which Method worked for you? Thank You.