IndexError: list index out of rangeや、関数の挙動を修正したい

前提

python初心者です
授業の一環で、flaskで俳句の季節類推システムを作っています。
入力された季語がどの季節に該当するかを判定し、もし、季節が判別しづらいものであったら（三春などに該当するものですが、ここでは詳細を省きます）、その季語をword2vecで、俳句中の他の単語との類似度から算出した値で決めるというものです
word2vecでの関数からのreturnを受け取る時に以下のエラーメッセージが発生しました。

rekigo = q[0]

IndexError: list index out of range

実現したいこと

エラーを消して、一連の流れを完遂させたい

エラーメッセージ

rekigo = q[0]

IndexError: list index out of range

該当のソースコード

python
1view.py
2
3import logging
4
5from flask import Blueprint, render_template, request, session
6from flask_wtf.csrf import CSRFError
7
8from apps.haiku.form import UploadhaikuForm
9from apps.haiku.season import seki
10from apps.haiku.setup_log import setup_log
11from apps.haiku.word2vec import simiweight, split_weight
12
13ha = Blueprint("haiku", __name__, template_folder="templates")
14
15@ha.route("/", methods=["GET", "POST"])
16def detectkigo():
17    r = []
18    q = []
19    form = UploadhaikuForm()
20    if request.method == "GET":
21        return render_template("haiku/index.html", form=form)
22    elif request.method == "POST" and form.validate:
23        session["postkigo"] = form.kigo  # htmlからの入力
24        session["posthaiku"] = form.haiku  # htmlからの入力
25        postkigo = session["postkigo"]
26        posthaiku = str(session["posthaiku"])
27        season = seki(postkigo)
28        setup_log()
29        logging.debug("%s", season)
30        if season == "三春":
31            r = split_weight(postkigo, posthaiku, season)
32            nouns = r[0]
33            sword = r[1]
34            seasonname = r[2]
35            q = simiweight(nouns, sword, seasonname)
36        #  return split_weight(kigo, haiku, season)
37        elif season == "三夏":
38            r = split_weight(postkigo, posthaiku, season)
39            nouns = r[0]
40            sword = r[1]
41            seasonname = r[2]
42            q = simiweight(nouns, sword, seasonname)
43        # return split_weight(kigo, haiku, season)
44        elif season == "三秋":
45            r = split_weight(postkigo, posthaiku, season)
46            nouns = r[0]
47            sword = r[1]
48            seasonname = r[2]
49            q = simiweight(nouns, sword, seasonname)
50        # return split_weight(kigo, haiku, season)
51        elif season == "三冬":
52            r = split_weight(postkigo, posthaiku, season)
53            nouns = r[0]
54            sword = r[1]
55            seasonname = r[2]
56            q = simiweight(nouns, sword, seasonname)
57        # return split_weight(kigo, haiku, season)
58
59        rekigo = q[0]
60        resum = q[1]
61        thse = q[2]  # rekigo=春夏秋冬　resum=類似度合計値
62        return render_template(
63            "haiku/index.html", season=rekigo, sum=resum, three=thse, form=form
64        )
65
66    if __name__ == "__main__":
67        ha.debug = True
68        ha.run(host="0.0.0.0", port=int("5000"), debug=True)
69
70
71@ha.errorhandler(CSRFError)
72def handle_csrf_error(e):
73    return render_template("haiku/csrf_error.html", reason=e.description), 400
74

python
1season.py
2
3from openpyxl import load_workbook
4
5def seki(kigo):
6    wb = load_workbook(r"C:/Users/81804/flaskbook/apps/haiku/季語.xlsx")
7    ws = wb["スクレイピング結果"]
8    ws = wb.active
9    target_string = kigo
10    season = "三秋"
11    for r in ws.columns:
12        for c in r:
13            # もしc.valueがtarget_valueと一致したらその行番号を返す
14            if c.value == target_string:
15                # セル番地を指定する:M10
16                v = c.row
17                b = int(v)
18                season = ws.cell(row=b, column=2).value
19                return season

python
1word2vec.py
2
3import MeCab
4from gensim.models import KeyedVectors
5
6model_dir = r"C:/Users/81804/flaskbook/apps/haiku/entity_vector.model.bin"
7model = KeyedVectors.load_word2vec_format(model_dir, binary=True)
8
9
10def split_weight(sword, text, season):
11    m = MeCab.Tagger("-Ochasen")
12    parse_result = [line.split() for line in m.parse(text).splitlines()][:-1]
13    nouns = [w[0] for w in parse_result if w[3].startswith("名詞")]
14
15    if sword in nouns:
16        num = nouns.index(sword)  # 俳句中の季語の配列の格納場所を判定
17
18    seasoname = season
19    nouns.pop(num)  # 季語を配列から除去
20    return nouns, sword, seasoname  # 俳句中の名詞と季語を渡す
21
22def simiweight(nouns, sword, seasoname):
23    seasons = ["春", "夏", "秋", "冬"]
24    weight = []
25    for e in seasons:
26        s = model.similarity(sword, e)
27        weight.append(s)
28   
29    max = -1
30    i = 0
31    count = 0
32    for n in seasons:  # nで季節を切り替え
33        sum = 0
34        for f in nouns:  # 俳句中の単語
35            p = model.similarity(f, n)
36            sum = sum + p * weight[i]
37            if sum > max:
38                max = sum
39        count = count + 1
40        i = i + 1
41    season = seasoname
42
43    if count == 1:
44        se = "春"
45    elif count == 2:
46        se = "夏"
47    elif count == 3:
48        se = "秋"
49    elif count == 4:
50        se = "冬"
51
52    return se, max, season

python
1form.py
2
3from flask_wtf.form import FlaskForm
4from wtforms import TextAreaField
5from wtforms.fields.simple import SubmitField
6from wtforms.validators import Length
7
8
9class UploadhaikuForm(FlaskForm):
10    # ファイルフィールドに必要なバリデーションを設定する
11    kigo = TextAreaField(
12        "季語を入力してください:", validators=[Length(min=1, max=5, message="季語の長さにしてください")]
13    )
14    haiku = TextAreaField(
15        "俳句を入力してください:", validators=[Length(min=8, max=20, message="俳句の長さにしてください")]
16    )
17    submit = SubmitField("アップロード")