My Advent of Code solutions!

four.py

def validate(passphrase):
    passphrase = passphrase.split(' ')
    for word in passphrase:
        if passphrase.count(word) > 1: return 0
    return 1

def f(x):
    y = 0
    for passphrase in x:
        y += validate(passphrase)
    return y

with open('./four.input', 'r') as file:
    x = [_.strip() for _ in file.readlines()]
    print(f(x))

one.py

def f(x):
    y = 0
    if x.isdigit():
        x = [int(_) for _ in str(x)]
        for i in range(len(x)):
            try:
                if (x[i] == x[i + 1]): y += x[i]
            except IndexError: pass
            if i == len(x) - 1:
                if x[0] == x[i]: y += x[i]
        return y

with open('./one.input', 'r') as file:
    x = file.read().strip()
    print('<<<', f(x))

three.py

def f(goal):
    x = y = dx = 0
    dy = -1
    step = 0

    while True:
        step += 1
        if goal == step:
            return abs(x) + abs(y)
        if (x == y) or (x < 0 and x == -y) or (x > 0 and x == 1-y):
            dx, dy = -dy, dx
        x, y = x+dx, y+dy

print(f(289326))

def part2(goal):
    coords = [(1, 0), (1, -1), (0, -1), (-1, -1), (-1, 0), (-1, 1), (0, 1), (1, 1)]
    x = y = dx = 0
    dy = -1
    grid = {}

    while True:
        total = 0
        for offset in coords:
            ox, oy = offset
            if (x+ox, y+oy) in grid:
                total += grid[(x+ox, y+oy)]
        if total > int(goal):
            return total
        if (x, y) == (0, 0):
            grid[(0, 0)] = 1
        else:
            grid[(x, y)] = total
        if (x == y) or (x < 0 and x == -y) or (x > 0 and x == 1-y):
            dx, dy = -dy, dx
        x, y = x+dx, y+dy

print(part2(289326))

two.py

import pandas as pd

def f(x):
    y = 0
    for i, row in x.iterrows():
        y += max(list(row)) - min(list(row))
    return y

x = pd.read_table('./two.input', header=None)
print(f(x))