# 
## The Python `sympy` library

Python `sympy` is an open-source  library used for symbolic mathematics. We can use `pip` to install `sympy` by using the following command.

```
pip install sympy
```

## The `primenu()` method

The `primenu()` method is used to return the number of distinct prime factors for a given number. Here is how we can use the method in code.
```python
sympy.primenu(n)
```
>**Note:** Do not forget to `import sympy` at the start of your Python script.

In the above example, we've passed `n` to the `primenu()` method. `n` has to be a positive integer. `primenu()` will return the number of distinct prime factors for the given positive integer `n`.

## Example
Here is a simple Python script that uses `primenu()`.

import sympy

n = 100

print("The prime factors of %s are %s" % (n, sympy.primefactors(n)))
print("The number of distinct prime factors for %s is %s" % (n, sympy.primenu(n)))

python39

## Code explanation

* Click "Run" to see the result of the code above. Change the value of n and hit "Run" again to see the change in the result.

- Line 1: We import the `sympy` module so we can access its methods.
- Line 3: We define and initialize `n`, the variable we will pass to `primenu()`.
- Line 5: We print the prime factors of `n` using the [primefactors](https://www.educative.io/answers/what-is-the-sympyprimefactors-method-in-python) method.
- Line 6: We print the number of distinct prime factors of `n` obtained using the `primenu()` method.

What is the sympy.primenu() method in Python?

The Python sympy library

The primenu() method

Example

Code explanation

The Python `sympy` library

The `primenu()` method