# Ngl.ind

Gets the indices of a Python list where the list values are true.

## Prototype

tindex = Ngl.ind(plist)

## Arguments

*plist*

A Python list, tuple, or one-dimensional NumPy array.

## Return value

*tindex*

A list of integer indices where *plist* is True, that is, non-zero.

## Description

This function takes a Python list, tuple, or one-dimensional NumPy array as its only argument and returns a list of indices where the values in the input are true.

## Examples

The following script:

import Ngl plist = [False, True, True, False, False, True] tlist =produces:Ngl.ind(plist) print tlistNgl.end()

[1, 2, 5]