#0230

Normalize URL Path

MediumPython25 min20 XP

Problem

Given a URL path, remove duplicate slashes, ignore ".", and resolve ".." by going up one segment.

Why This Matters

Path normalization combines string parsing with stack behavior and shows up in routing, file systems, and URL cleaning.

Function Signature

def normalize_path(path):

Examples

Example 1

Input"/api//v1/../users/./42"

Output"/api/users/42"

v1 is removed by .., duplicate slashes disappear, and . is ignored.

Constraints

Return the exact requested value.
Handle edge cases cleanly.
Prefer readable Python before micro-optimizing.

CodePython

def normalize_path(path):
    """
    Input example: "/api//v1/../users/./42"
    Return: "/api/users/42"
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return "/"

def normalize_path(path):
    """
    Input example: "/api//v1/../users/./42"
    Return: "/api/users/42"
    Return the value from the function so the tests can compare it. Do not print unless the prompt asks.
    """
    # write your code here
    return "/"

Visible browser tests run here when available.

Testcases1 visible / 3 hidden categories

Core example

Input"/api//v1/../users/./42"

Expected"/api/users/42"

v1 is removed by .., duplicate slashes disappear, and . is ignored.

Hidden Test Categories

root pathtoo many .. segmentsduplicate slashes