human
Give me a the Python code you requested given the following:
I am working on the file "2017/iker/Ferran AoC 2017.ipynb".
The first task is:
Day 16
Regex are expensive, even if you do not "precompile" them
Can you write Python code for it?
assistant
#Here is the Python code you requested.

import re
import numpy as np
import copy

def shuffle(p, moves):
    s = copy.copy(p)
    for move in moves:
        spin = re.search('s(\d+)', move)
        swapx = re.search('x(\d+)\/(\d+)', move)
        swapp = re.search('p(\w)\/(\w)', move)
        if spin:
            s = np.roll(s, int(spin.group(1)))
        if swapx:
            a = int(swapx.group(1))
            b = int(swapx.group(2))
            s[a], s[b] = s[b], s[a]
        if swapp:
            a = swapp.group(1)
            b = swapp.group(2)
            a = ''.join(s).index(a)
            b = ''.join(s).index(b)
            s[a], s[b] = s[b], s[a]
    return ''.join(s)

%%timeit
shuffle(list('abcde'), ['s1', 'x3/4', 'pe/b'])

def parse(instruction):
    name = instruction[0]
    params = instruction[1:]
    if name == 's':
        params = [int(params)]
    else:
        params = params.split('/')
        if name == 'x':
            params = list(map(int, params))
    return name, params

class Programs:

    def __init__(self, progs):
        self.progs = progs
        self.length = len(self.progs)
        self.instructions_dict = {'s': self.spin, 'x': self.exchange, 'p': self.partner}

    def spin(self, pos):
        pos = pos % self.length
        if pos > 0:
            tmp = self.progs[-pos:]
            progs = tmp + self.progs
            self.progs = progs[:self.length]

    def exchange(self, pos1, pos2):
        v1 = self.progs[pos1]
        v2 = self.progs[pos2]
        self.progs = self.progs[:pos1] + v2 + self.progs[pos1+1:]
        self.progs = self.progs[:pos2] + v1 + self.progs[pos2+1:]

    def partner(self, prog1, prog2):
        self.exchange(self.progs.index(prog1), self.progs.index(prog2))

    def dance(self, instructions):
        for inst, params in instructions:
            self.instructions_dict[inst](*params)
        return p.progs

%%timeit
p = Programs('abcde')
p.dance([parse(inst) for inst in ['s1', 'x3/4', 'pe/b']])

import re
import numpy as np
import copy

regex1 = re.compile('s(\d+)')
regex2 =...