Cantonese_preprocessing.ipynb

{
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   "cell_type": "code",
   "execution_count": 1,
   "id": "eaac17c2",
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   "outputs": [
    {
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     "output_type": "stream",
     "text": [
      "Requirement already satisfied: pycantonese in c:\\programdata\\anaconda3\\lib\\site-packages (3.4.0)\n",
      "Requirement already satisfied: wordseg==0.0.2 in c:\\programdata\\anaconda3\\lib\\site-packages (from pycantonese) (0.0.2)\n",
      "Requirement already satisfied: pylangacq<0.17.0,>=0.16.0 in c:\\programdata\\anaconda3\\lib\\site-packages (from pycantonese) (0.16.2)\n",
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      "Requirement already satisfied: python-dateutil<=3.0.0,>=2.0.0 in c:\\programdata\\anaconda3\\lib\\site-packages (from pylangacq<0.17.0,>=0.16.0->pycantonese) (2.8.2)\n",
      "Requirement already satisfied: tabulate[widechars]<=0.9.0,>=0.8.9 in c:\\programdata\\anaconda3\\lib\\site-packages (from pylangacq<0.17.0,>=0.16.0->pycantonese) (0.8.10)\n",
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      "Requirement already satisfied: urllib3<1.27,>=1.21.1 in c:\\programdata\\anaconda3\\lib\\site-packages (from requests<=3.0.0,>=2.18.0->pylangacq<0.17.0,>=0.16.0->pycantonese) (1.26.11)\n",
      "Requirement already satisfied: idna<4,>=2.5 in c:\\programdata\\anaconda3\\lib\\site-packages (from requests<=3.0.0,>=2.18.0->pylangacq<0.17.0,>=0.16.0->pycantonese) (3.3)\n",
      "Requirement already satisfied: certifi>=2017.4.17 in c:\\programdata\\anaconda3\\lib\\site-packages (from requests<=3.0.0,>=2.18.0->pylangacq<0.17.0,>=0.16.0->pycantonese) (2022.12.7)\n",
      "Requirement already satisfied: wcwidth in c:\\programdata\\anaconda3\\lib\\site-packages (from tabulate[widechars]<=0.9.0,>=0.8.9->pylangacq<0.17.0,>=0.16.0->pycantonese) (0.2.5)\n"
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       "1949095"
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     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Accessing the Yip-Matthews CantoneseEnglish bilingual corpus (Yip and Matthews, 2007)\n",
    "!pip install pycantonese\n",
    "import pycantonese\n",
    "url = (\n",
    "    \"https://childes.talkbank.org/\"\n",
    "    \"data/Biling/YipMatthews.zip\"\n",
    ")\n",
    "corpus = pycantonese.read_chat(url)\n",
    "corpus.n_files()\n",
    "501\n",
    "len(corpus.words())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "f780ef18",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'一啲',\n",
       " '一定',\n",
       " '不如',\n",
       " '不過',\n",
       " '之後',\n",
       " '乜',\n",
       " '乜嘢',\n",
       " '人哋',\n",
       " '但係',\n",
       " '你',\n",
       " '你哋',\n",
       " '佢',\n",
       " '佢哋',\n",
       " '係',\n",
       " '個',\n",
       " '其他',\n",
       " '冇',\n",
       " '再',\n",
       " '到',\n",
       " '即',\n",
       " '即係',\n",
       " '原來',\n",
       " '去',\n",
       " '又',\n",
       " '可以',\n",
       " '可能',\n",
       " '同',\n",
       " '同埋',\n",
       " '吖',\n",
       " '呀',\n",
       " '呢',\n",
       " '咁',\n",
       " '咗',\n",
       " '咩',\n",
       " '咪',\n",
       " '哦',\n",
       " '哩',\n",
       " '哩個',\n",
       " '哩啲',\n",
       " '哩度',\n",
       " '哩樣',\n",
       " '唔',\n",
       " '唔使',\n",
       " '唔係',\n",
       " '啊',\n",
       " '啲',\n",
       " '喎',\n",
       " '喺',\n",
       " '喺度',\n",
       " '嗯',\n",
       " '嗰',\n",
       " '嗰個',\n",
       " '嗰啲',\n",
       " '嗰度',\n",
       " '嘅',\n",
       " '嘢',\n",
       " '噉',\n",
       " '噉樣',\n",
       " '因為',\n",
       " '多',\n",
       " '太',\n",
       " '好',\n",
       " '如果',\n",
       " '就',\n",
       " '已經',\n",
       " '幾',\n",
       " '幾多',\n",
       " '得',\n",
       " '想',\n",
       " '應該',\n",
       " '成日',\n",
       " '我',\n",
       " '我哋',\n",
       " '或者',\n",
       " '所以',\n",
       " '最',\n",
       " '會',\n",
       " '有',\n",
       " '有冇',\n",
       " '有啲',\n",
       " '未',\n",
       " '梗係',\n",
       " '然之後',\n",
       " '由',\n",
       " '真係',\n",
       " '睇',\n",
       " '知',\n",
       " '而',\n",
       " '而家',\n",
       " '自己',\n",
       " '要',\n",
       " '覺得',\n",
       " '話',\n",
       " '諗',\n",
       " '講',\n",
       " '譬如',\n",
       " '跟住',\n",
       " '返',\n",
       " '過',\n",
       " '邊個',\n",
       " '都',\n",
       " '點',\n",
       " '點樣',\n",
       " '點解'}"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "stop_words = pycantonese.stop_words()\n",
    "stop_words"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "a56c2aa7",
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "df = pd.read_csv('廣東話.csv')\n",
    "df1 = pd.read_csv('posts.csv')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "026b142b",
   "metadata": {},
   "outputs": [
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       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>「美麗新日本」日本有女人偽造個人編號卡及外國人在留卡獲利200萬</td>\n",
       "      <td>\\n\\n日本治安笑死人</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>陳勇：波係圓嘅、選票係方嘅 未到最後不知選舉結果</td>\n",
       "      <td>【獨媒報導】距離區議會選舉不足一星期，派出122人參選的民建聯今（12月4日）辦記者會匯報選...</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>Netflix都去到幾盡</td>\n",
       "      <td>土耳其人要土耳其電話驗證之餘\\n仲要得土耳其文睇\\n勁顛</td>\n",
       "      <td>7</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>平反！邊個話 CU CS 畢業起薪得 18.5k？</td>\n",
       "      <td>係19.5k 呀 \\n\\n\\n\\n\\n香港第一！</td>\n",
       "      <td>19</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>阿凡達：潘朵拉邊境 12月7號禮拜4就出都無人講？</td>\n",
       "      <td>阿凡達電影咁靚，唔知game會點\\n4090 is ready\\n\\n會唔會影響之後d係劇情...</td>\n",
       "      <td>10</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>...</th>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>96</th>\n",
       "      <td>周庭，生日快樂 :)</td>\n",
       "      <td>入數紙呢度upload，我Tommy仔要賭馬</td>\n",
       "      <td>None</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>97</th>\n",
       "      <td>載入中...</td>\n",
       "      <td>LIHKG</td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>98</th>\n",
       "      <td>載入中...</td>\n",
       "      <td>LIHKG</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>99</th>\n",
       "      <td>【ViuTV】《社內相親》逢星期一至五 21:30（7）</td>\n",
       "      <td>\\n《社內相親》（英語：Business Proposal (HK version)）是Ma...</td>\n",
       "      <td>11</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>100</th>\n",
       "      <td>大陸女小紅書呻住尖沙咀酒店　因被指吸煙被罰8600元</td>\n",
       "      <td>臨近聖誕，不少內地人都會來港感受聖誕氣氛。有內地女昨日(3日)在小紅書發帖文，表示趁過去周末...</td>\n",
       "      <td>17</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "<p>101 rows × 3 columns</p>\n",
       "</div>"
      ],
      "text/plain": [
       "                                Title  \\\n",
       "0    「美麗新日本」日本有女人偽造個人編號卡及外國人在留卡獲利200萬   \n",
       "1            陳勇：波係圓嘅、選票係方嘅 未到最後不知選舉結果   \n",
       "2                        Netflix都去到幾盡   \n",
       "3           平反！邊個話 CU CS 畢業起薪得 18.5k？   \n",
       "4           阿凡達：潘朵拉邊境 12月7號禮拜4就出都無人講？   \n",
       "..                                ...   \n",
       "96                         周庭，生日快樂 :)   \n",
       "97                             載入中...   \n",
       "98                             載入中...   \n",
       "99       【ViuTV】《社內相親》逢星期一至五 21:30（7）   \n",
       "100        大陸女小紅書呻住尖沙咀酒店　因被指吸煙被罰8600元   \n",
       "\n",
       "                                          Main_content Category  \n",
       "0                                          \\n\\n日本治安笑死人        5  \n",
       "1    【獨媒報導】距離區議會選舉不足一星期，派出122人參選的民建聯今（12月4日）辦記者會匯報選...        5  \n",
       "2                         土耳其人要土耳其電話驗證之餘\\n仲要得土耳其文睇\\n勁顛        7  \n",
       "3                             係19.5k 呀 \\n\\n\\n\\n\\n香港第一！       19  \n",
       "4    阿凡達電影咁靚，唔知game會點\\n4090 is ready\\n\\n會唔會影響之後d係劇情...       10  \n",
       "..                                                 ...      ...  \n",
       "96                              入數紙呢度upload，我Tommy仔要賭馬     None  \n",
       "97                                               LIHKG       31  \n",
       "98                                               LIHKG        5  \n",
       "99   \\n《社內相親》（英語：Business Proposal (HK version)）是Ma...       11  \n",
       "100  臨近聖誕，不少內地人都會來港感受聖誕氣氛。有內地女昨日(3日)在小紅書發帖文，表示趁過去周末...       17  \n",
       "\n",
       "[101 rows x 3 columns]"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "df_comment = df[['Comment_content']]\n",
    "\n",
    "df1_comment = df1[['Title','Main_content','Category']]\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "ad407727",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "C:\\Users\\yeung\\AppData\\Local\\Temp\\ipykernel_17172\\411734147.py:26: SettingWithCopyWarning: \n",
      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
      "Try using .loc[row_indexer,col_indexer] = value instead\n",
      "\n",
      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
      "  df_comment['Comment_content'] = df_comment['Comment_content'].apply(preprocess_text)\n"
     ]
    }
   ],
   "source": [
    "import re\n",
    "\n",
    "def preprocess_text(text):\n",
    "    text = re.sub(r'[^\\w\\s]', '', text)\n",
    "    text = text.replace('\\n', '')\n",
    "    # Word Segmentation\n",
    "    words = list(text)\n",
    "    \n",
    "    # Stop Word Removal\n",
    "    stop_words = []  # Stop word list, customized according to needs\n",
    "    words = [word for word in words if word not in stop_words]\n",
    "    \n",
    "    # Text Cleaning\n",
    "    words = [re.sub(r'[^\\u4e00-\\u9fff\\s]', '', word) for word in words]\n",
    "    \n",
    "    # Lowercasing\n",
    "    words = [word.lower() for word in words]\n",
    "    \n",
    "\n",
    "    \n",
    "    # Return preprocessed text\n",
    "    processed_text = ' '.join(words)\n",
    "    return processed_text\n",
    "\n",
    "# apply function\n",
    "df_comment['Comment_content'] = df_comment['Comment_content'].apply(preprocess_text)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "2b7aa7b6",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "C:\\Users\\yeung\\AppData\\Local\\Temp\\ipykernel_17172\\1015417887.py:2: SettingWithCopyWarning: \n",
      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
      "Try using .loc[row_indexer,col_indexer] = value instead\n",
      "\n",
      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
      "  df1_comment['Title'] = df1_comment['Title'].fillna('')\n",
      "C:\\Users\\yeung\\AppData\\Local\\Temp\\ipykernel_17172\\1015417887.py:3: SettingWithCopyWarning: \n",
      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
      "Try using .loc[row_indexer,col_indexer] = value instead\n",
      "\n",
      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
      "  df1_comment['Main_content'] = df1_comment['Main_content'].fillna('')\n",
      "C:\\Users\\yeung\\AppData\\Local\\Temp\\ipykernel_17172\\1015417887.py:6: SettingWithCopyWarning: \n",
      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
      "Try using .loc[row_indexer,col_indexer] = value instead\n",
      "\n",
      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
      "  df1_comment[['Title', 'Main_content']] = df1_comment[['Title', 'Main_content']].applymap(preprocess_text)\n"
     ]
    }
   ],
   "source": [
    "# Fill null values into empty string\n",
    "df1_comment['Title'] = df1_comment['Title'].fillna('')\n",
    "df1_comment['Main_content'] = df1_comment['Main_content'].fillna('')\n",
    "\n",
    "# Preprocess Title and Main_content in df1_comment\n",
    "df1_comment[['Title', 'Main_content']] = df1_comment[['Title', 'Main_content']].applymap(preprocess_text)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "3784d4b1",
   "metadata": {},
   "outputs": [
    {
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       "      <th>0</th>\n",
       "      <td>美 麗 新 日 本 日 本 有 女 人 偽 造 個 人 編 號 卡 及 外 國 人 在 留 ...</td>\n",
       "      <td>日 本 治 安 笑 死 人</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>陳 勇 波 係 圓 嘅 選 票 係 方 嘅   未 到 最 後 不 知 選 舉 結 果</td>\n",
       "      <td>獨 媒 報 導 距 離 區 議 會 選 舉 不 足 一 星 期 派 出    人 參 選 的...</td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>都 去 到 幾 盡</td>\n",
       "      <td>土 耳 其 人 要 土 耳 其 電 話 驗 證 之 餘 仲 要 得 土 耳 其 文 睇 勁 顛</td>\n",
       "      <td>7</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>平 反 邊 個 話           畢 業 起 薪 得</td>\n",
       "      <td>係       呀   香 港 第 一</td>\n",
       "      <td>19</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>阿 凡 達 潘 朵 拉 邊 境     月  號 禮 拜  就 出 都 無 人 講</td>\n",
       "      <td>阿 凡 達 電 影 咁 靚 唔 知     會 點                會 唔 會...</td>\n",
       "      <td>10</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>...</th>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>96</th>\n",
       "      <td>周 庭 生 日 快 樂</td>\n",
       "      <td>入 數 紙 呢 度       我      仔 要 賭 馬</td>\n",
       "      <td>None</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>97</th>\n",
       "      <td>載 入 中</td>\n",
       "      <td></td>\n",
       "      <td>31</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>98</th>\n",
       "      <td>載 入 中</td>\n",
       "      <td></td>\n",
       "      <td>5</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>99</th>\n",
       "      <td>社 內 相 親 逢 星 期 一 至 五</td>\n",
       "      <td>社 內 相 親 英 語                                是  ...</td>\n",
       "      <td>11</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>100</th>\n",
       "      <td>大 陸 女 小 紅 書 呻 住 尖 沙 咀 酒 店 　 因 被 指 吸 煙 被 罰     元</td>\n",
       "      <td>臨 近 聖 誕 不 少 內 地 人 都 會 來 港 感 受 聖 誕 氣 氛 有 內 地 女 ...</td>\n",
       "      <td>17</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "<p>101 rows × 3 columns</p>\n",
       "</div>"
      ],
      "text/plain": [
       "                                                 Title  \\\n",
       "0    美 麗 新 日 本 日 本 有 女 人 偽 造 個 人 編 號 卡 及 外 國 人 在 留 ...   \n",
       "1          陳 勇 波 係 圓 嘅 選 票 係 方 嘅   未 到 最 後 不 知 選 舉 結 果   \n",
       "2                                            都 去 到 幾 盡   \n",
       "3                  平 反 邊 個 話           畢 業 起 薪 得         \n",
       "4            阿 凡 達 潘 朵 拉 邊 境     月  號 禮 拜  就 出 都 無 人 講   \n",
       "..                                                 ...   \n",
       "96                                       周 庭 生 日 快 樂     \n",
       "97                                               載 入 中   \n",
       "98                                               載 入 中   \n",
       "99                          社 內 相 親 逢 星 期 一 至 五          \n",
       "100    大 陸 女 小 紅 書 呻 住 尖 沙 咀 酒 店 　 因 被 指 吸 煙 被 罰     元   \n",
       "\n",
       "                                          Main_content Category  \n",
       "0                                        日 本 治 安 笑 死 人        5  \n",
       "1    獨 媒 報 導 距 離 區 議 會 選 舉 不 足 一 星 期 派 出    人 參 選 的...        5  \n",
       "2      土 耳 其 人 要 土 耳 其 電 話 驗 證 之 餘 仲 要 得 土 耳 其 文 睇 勁 顛        7  \n",
       "3                                  係       呀   香 港 第 一       19  \n",
       "4    阿 凡 達 電 影 咁 靚 唔 知     會 點                會 唔 會...       10  \n",
       "..                                                 ...      ...  \n",
       "96                      入 數 紙 呢 度       我      仔 要 賭 馬     None  \n",
       "97                                                           31  \n",
       "98                                                            5  \n",
       "99   社 內 相 親 英 語                                是  ...       11  \n",
       "100  臨 近 聖 誕 不 少 內 地 人 都 會 來 港 感 受 聖 誕 氣 氛 有 內 地 女 ...       17  \n",
       "\n",
       "[101 rows x 3 columns]"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "df1_comment"
   ]
  }
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