Day5 Python3

Parsing
import re
f=open('input.txt')
pack,moves=f.read().split("\n\n")
pack=pack.split("\n")
x=list(map(int,re.findall("[0-9]+",moves)))
moves=[x[i:i+3] for i in range(0,len(x),3) ]
ind=list(m.start(0) for m in re.finditer("[0-9]+",pack[len(pack)-1]))
#cerco gli indici dei numeri delle colonne che saranno gli stessi in cui ci sono le lettere nelle righe sovrasranti, in realtà basta range(1,len(riga),4) ma vabbè
crates=[]
for i in ind:
    col=[]
    for j in range(len(pack)-2,-1,-1):
        if pack[j][i]!=" ":
           col.append(pack[j][i])
    crates.append(col)

Part 1
for x in moves:
    for i in range(x[0]):
        crates[x[2]-1].append(crates[x[1]-1].pop())
print(''.join(crates[i][len(crates[i])-1] for i in range(len(crates))))

Part 2
for x in moves:
    rem=[]
    for i in range(x[0]): rem.append(crates[x[1]-1].pop())
    for i in range(x[0]): crates[x[2] - 1].append(rem[-i-1])
print(''.join(crates[i][len(crates[i])-1] for i in range(len(crates))))