Codewars. Python

path-finder-4-4kyu.py

import re

def check(exp): 
    if len(exp) == 1 and exp[0] in ["r","l","R","L"]:
        return f"{exp}0"
    else:
        return exp
    
def mutation(vector,y,x,val):
    if vector == "right": x+= val
    if vector == "left": x-= val
    if vector == "top": y-= val
    if vector == "bottom": y+= val
    return y,x
    
    
y,x = 0,0 
vector = "top"

keys = {
"top+r": "right",
"top+l": "left",
"right+r": "bottom",
"right+l": "top",
"bottom+r": "left",
"bottom+l": "right",
"left+r": "top",
"left+l": "bottom",
"left":"right","right":"left",
"top":"bottom","bottom":"top"
}

def i_am_here(path):
    global y,x,vector
    if len(re.findall(r"^\d*",path)[0]) > 0: y,x = mutation(vector,y,x,int(re.findall(r"^\d*",path)[0]))
    actions = [*re.findall(r"[r|l|R|L]\d*",path)]

    for i in range(len(actions)):
        actions[i] = check(actions[i])
        val = int(actions[i][1::])
        if actions[i][0] == "r": 
            vector = keys[f"{vector}+r"]
            y,x = mutation(vector,y,x,val)
        if actions[i][0] == "l":
            vector = keys[f"{vector}+l"]
            y,x = mutation(vector,y,x,val)
        if actions[i][0] in ["L","R"]:
            vector = keys[vector]
            y,x = mutation(vector,y,x,val)
    return [y,x]