问Python:通过级联大小将字符串列表拆分为较小块的有效方法

EN

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import random
import string
import sys

MAX_LENGTH = 20
MAX_SIZE = 11111


def get_random():
    return ''.join([
        random.choice(string.ascii_letters) for i in range(
            random.randrange(10, 1000))])


def get_random_list():
    return [get_random() for i in range(random.randrange(50, 1000))]


def get_str_length(rnd_list, item_idx):
    return len(''.join(rnd_list[:item_idx]))

rnd_list = get_random_list()


def calculate_ideal_amount(rnd_list):
    list_bounds = {
        'first': 1,
        'last': len(rnd_list)
    }
    print ('ORIG_SIZE: %s, ORIG_LEN: %s' % (
        get_str_length(rnd_list, len(rnd_list)), len(rnd_list)))
    if get_str_length(rnd_list, list_bounds['first']) > MAX_SIZE:
        return 0
    if get_str_length(rnd_list, list_bounds['last']) <= MAX_SIZE and \
            list_bounds['last'] <= MAX_LENGTH:
        return list_bounds['last']
    while True:
        difference = round((list_bounds['last'] - list_bounds['first']) / 2)
        middle_item_idx = list_bounds['first'] + difference
        str_len = get_str_length(
            rnd_list, middle_item_idx)
        print(
            'MAX_SIZE: %s, list_bounds: %s, '
            'middle_item_idx: %s, diff: %s, str_len: %s,' % (
                MAX_SIZE, list_bounds, middle_item_idx, difference, str_len))
        # sys.stdin.readline()
        if str_len > MAX_SIZE:
            list_bounds['last'] = middle_item_idx
            continue
        if middle_item_idx > MAX_LENGTH:
            return MAX_LENGTH
        list_bounds['first'] = middle_item_idx
        if difference == 0:
            if get_str_length(rnd_list, list_bounds['last']) <= MAX_SIZE:
                if list_bounds['last'] > MAX_LENGTH:
                    return MAX_LENGTH
                return list_bounds['last']
            return list_bounds['first']

ideal_idx = calculate_ideal_amount(rnd_list)

print (
    len(rnd_list), get_str_length(rnd_list, len(rnd_list)),
    get_str_length(rnd_list, ideal_idx), ideal_idx,
    get_str_length(rnd_list, ideal_idx + 1))