﻿ Python: Find the index of the first element in the given list that satisfies the provided testing function - w3resource

# Python: Find the index of the first element in the given list that satisfies the provided testing function

## Python List: Exercise - 229 with Solution

Write a Python program to find the index of the first element in the given list that satisfies the provided testing function.

Use a list comprehension, enumerate() and next() to return the index of the first element in nums for which fn returns True.

Sample Solution:

Python Code:

``````def find_index(nums, fn):
return next(i for i, x in enumerate(nums) if fn(x))
print(find_index([1, 2, 3, 4], lambda n: n % 2 == 1))
```
```

Sample Output:

```0
```

Flowchart:

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## Python: Tips of the Day

```print(2_000_000)
```2000000