EPWING JSON cleaner for Nazeka

#!python
# -*- coding: utf-8 -*-
from collections import OrderedDict
import json
import sys
from io import open
import re

#works with shinjirin and shinmeikai

entries = json.load(open("shinjirin.json", encoding="utf-8"), object_pairs_hook=OrderedDict)

jj = []

def iskana(s):
    for c in s:
        c = ord(c)
        if c == " " or c == "　":
            continue
        # hiragana and katakana
        elif c >= 0x3040 and c < 0x3100:
            continue
        # halfwidth etc
        elif c >= 0xFF65 and c < 0xFFA0:
            continue
        # ainu extensions
        elif c >= 0x31F0 and c < 0x3200:
            continue
        # hentaigana A
        elif c >= 0x1B000 and c < 0x1B100:
            continue
        # hentaigana B
        elif c >= 0x1B100 and c < 0x1B130:
            continue
        else:
            return False
    return True

i = 0
for entry in entries["subbooks"][0]["entries"]:
    #if i > 10000: break
    i += 1
    try:
        # some entries are broken (zero-epwing gives no text, ebwin4 shows trash)
        heading = entry["heading"]
        text = entry["text"]
    except:
        continue

    if "【" in heading:
        reading = heading.split("【")[0]
        spelling = heading.split("【")[1].split("】")[0]
    elif "[" in heading:
        reading = heading.split("[")[0]
        spelling = heading.split("[")[1].split("]")[0]
    else:
        reading = heading
        spelling = ""
    reading = reading.replace("-", "")
    reading = reading.replace("・", "")
    spellings = spelling.split("・")
    lines = text.split("\n")[1:-1]
    if lines[0] != "" and lines[0][0] == "（" and lines[0][-1] == "）" and "）" not in lines[0][1:-1]:
        lines = lines[1:]


    if len(reading) == 1 and spellings[0] == "" and len(lines) > 10:
        continue

    if len(reading) == 0:
        continue

    if not iskana(reading):
        continue

    jj += [OrderedDict([("r",reading),("s",spellings),("l",lines)])]


f = open("nazeka_shinjirin.json", "w", newline="\n", encoding="utf-8")
f.write(json.dumps(jj, ensure_ascii=False, indent=4, separators=(',',':')))#, separators=(',',':')))
f.close()