delete old code; unused atoms, functions, comments

import requests

import time

ASPIRIN = "C9H8O4"

DOXYCYCLINE = "C22H24N2O8"

IBUPROFEN = "C13H18O2"

LORATADINE = "C22H23ClN2O2"

PARACETAMOL = "C8H9NO2"

VANCOMYCIN = "C66H75Cl2N9O24"

FOSFOMYCIN = "C3H7O4P"

LINEZOLID = "C16H20FN3O4"

MIN_ISOMER_COUNT = 500

MAX_CID_SEGMENT_LEN = 4000  # maybe 3997

H_C_ratio_max = 48 / 25

H_C_ratio_min = 17 / 15

Cl_C_ratio_max = 1 / 30

Cl_C_ratio_min = 0

Cl_range = [0, 1]

F_C_ratio_max = 1 / 16

F_C_ratio_min = 0

F_range = [0, 1]

N_C_ratio_max = 4 / 13

N_C_ratio_min = 0

O_C_ratio_max = 2 / 5

O_C_ratio_min = 1 / 4

P_C_ratio_max = 1 / 3

P_C_ratio_min = 0

P_range = [0, 1]

S_C_ratio_max = 1 / 15

S_C_ratio_min = 0

S_range = [0, 1, 2]

def add_atom(atom: str, C_count: int, ratio_max: float, ratio_min: float):

    ret = ""

    return ret

def add_atom2(atom: str, range: list):

    ret = ""

    count = random.choice(range)

    if count > 1:

        ret += atom + str(count)

    elif count == 0:

        ret += atom

    return ret

def wait_for_api(previous_time):

    if previous_time != None:

        while time.time() - previous_time < 0.2:

            C_count = random.randint(C_count_min, C_count_max)

            chemical_formula += "C" + str(C_count)

            chemical_formula += add_atom("H", C_count, H_C_ratio_max, H_C_ratio_min)

            # chemical_formula += add_atom("Cl", C_count, Cl_C_ratio_max, Cl_C_ratio_min)

            # chemical_formula += add_atom("F", C_count, F_C_ratio_max, F_C_ratio_min)

            chemical_formula += add_atom("N", C_count, N_C_ratio_max, N_C_ratio_min)

            chemical_formula += add_atom("O", C_count, O_C_ratio_max, O_C_ratio_min)

            # chemical_formula += add_atom("P", C_count, P_C_ratio_max, P_C_ratio_min)

            # chemical_formula += add_atom("S", C_count, S_C_ratio_max, S_C_ratio_min)

        url = (

            "https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/fastformula/"