Given a valid (IPv4) IP `address`, return a defanged version of that IP address.

A _defanged IP address_ replaces every period `". "` with `"[.] "`.

**Example 1:**

**Input:** address = "1.1.1.1"
**Output:** "1\[.\]1\[.\]1\[.\]1"

**Example 2:**

**Input:** address = "255.100.50.0"
**Output:** "255\[.\]100\[.\]50\[.\]0"

**Constraints:**

*   The given `address` is a valid IPv4 address.


def defangIPaddr(address: str) -> str:
    return address.replace('.', '[.]')
