Calcular média via pastebin

from urllib.request import Request
import os, ssl, math, urllib

def arredondarMP(mp):
    if len(str(mp)) > 4:
        mp = float(str(mp)[:4])
    if int(str(mp)[-1]) != 0 and len(str(mp)) == 4:
        if int(str(mp)[-1]) > 5:
            arredondamento = math.ceil(float(str(mp)[-2] + "." + str(mp)[-1]))
        else:
            arredondamento = math.trunc(float(str(mp)[-2] + "." + str(mp)[-1]))
        mp = float(str(mp)[:2] + str(arredondamento))
    return mp

def calcular(notas, nome, semestre):
    os.system("clear")
    print(f"Aluno: {nome}\nSemestre: {semestre}")
    ira = 0
    cr = 0
    for i in range(int((len(notas) - 1) / 6)):
        offset = 6 * i
        dados = notas[offset + 1].split(", ")
        cadeira = dados[0]
        media = int(dados[1])
        creditos = int(dados[2])
        n1_0 = float(notas[offset + 2][7:])
        n1_1 = float(notas[offset + 3][7:])
        n2_0 = float(notas[offset + 4][7:])
        n2_1 = float(notas[offset + 5][7:])
        af = float(notas[offset + 6][5:])
        n1 = (n1_0 + n1_1) / 2
        n2 = (n2_0 + n2_1) / 2
        mp = ((2 * n1) + (3 * n2)) / 5
        mp = arredondarMP(mp)
        cr += creditos
        if mp > 6:
            situacao = "Aprovado"
            mf = mp
        elif mp < 3:
            situacao = "Reprovado"
            mf = mp
        elif 3 < mp < 6:
            situacao = "Avaliação Final"
            mf = (mp + af) / 2
            if mf > media:
                situacaoAF = "Aprovado"
            else:
                situacaoAF = "Reprovado"
        ira += mf * creditos
        print("_" * 25 + "\n")
        print(f"Cadeira: {cadeira} ({media})\n" + "_" * 25 + "\n")
        print(f"Prova 1: {n1_0}\tProva 3: {n2_0}\nProva 2: {n1_1}\tProva 4: {n2_1}\n")
        print(f"N1: {n1:.2f}\t\tN2: {n2:.2f}\n")
        print(f"Média parcial:\t\t{mp:.2f}")
        print(f"Situação parcial:\t{situacao}\n")
        print(f"Média Final:\t\t{mf:.2f}")
        if af == 0:
            print(f"Situação Final:\t\t{situacao}")
        else:
            print(f"Situação Final:\t\t{situacaoAF}")
    print("_" * 25 + "\n")
    print(f"IRA: {ira / cr:.2f}")


if (not os.environ.get('PYTHONHTTPSVERIFY', '') and getattr(ssl, "_create_unverified_context", None)):
    ssl._create_default_https_context = ssl._create_unverified_context

url = "https://pastebin.com/raw/MBeH7b4G"
headers = {'User-agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11"}
request = Request(url, None, headers)
response = urllib.request.urlopen(request).read()
notas = response.decode('utf-8').split("\n")

k = notas[0].split(", ")
nome = k[0]
semestre = k[1]
calcular(notas, nome, semestre)