filter in Python

The Filter built-in function is quite similar to the Map function in that it applies a function to a sequence (list, tuple, dictionary). The key difference is that filter() will only return the elements which the applied function returned as True.
```
# Our numbers
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]

# Function that filters out all numbers which are odd
def filter_odd_numbers(num):
    if num % 2 == 0:
        return True
    else:
        return False

filtered_numbers = filter(filter_odd_numbers, numbers)
print(filtered_numbers)
# filtered_numbers = [2, 4, 6, 8, 10, 12, 14]  
```
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