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# What is the numpy.trim_zeros() function in Python?

## What is the numpy.trim_zeros() function in Python? Answer

### Overview

The `trim_zeros()` function in Python is used to trim out the leading zeros from an input `1-D` array.

### Syntax

The `trim_zeros()` function takes the syntax below:

``numpy.trim_zeros(filt, trim='fb')``

Syntax for the trim_zeros() function in Python

### Parameter values

The `trim_zeros()` function takes the following parameter values:

• `filt`: This is the input array. It is a required parameter.
• `trim`: This is a string with an `'f'`, which represents trim from the front, and `'b'` , which represents trim from the back. This is an optional parameter.

### Return value

The `trim_zeros()` function returns an array whose leading zero entry(ies) is trimmed.

### Example

``````import numpy as np
# creating an input array
a = np.array([0, 0, 0, 1, 2, 3, 4, 5, 0, 0, 0])
print(a)

# trimming the zero entries from fromt
print(np.trim_zeros(a))

# trimming the zero entries from fromt
print(np.trim_zeros(a, "b"))``````

Implementing the trim_zeros() function

### Explanation

• Line 1: We import the `numpy` module.
• Line 3: We create an input array, `a` , using the `array()` function.
• Line 4: We print the input array, `a`.
• Line 7: We trim the zeros entries from the front of the array using the `trim_zeros()` function. We print the result to the console.
• Line 10: We trim the zeros entries from the back of the array using the `trim_zeros()` function. We print the result to the console.
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