afunTW / Python Crawling Tutorial
Licence: apache-2.0
Python crawling tutorial
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Python-Crawling-Tutorial 基礎爬蟲實戰
相關資源
最新的投影片放在 slideshare 上, 會不定期更新, 程式碼可透過這個頁面右邊的 Clone or download 下載
安裝環境
Anaconda (建議)
- 下載 Python 3.6 版本 https://www.continuum.io/downloads
- 練習題會使用到瀏覽器 Chrome，麻煩各位選擇自己電腦的平台安裝 Chrome
- 動態網站的爬蟲也需要下載 webdriver，需要額外下載
- 題目都是以
jupyter notebook進行，安裝完 Anaconda 後即可用內建jupyter notebook打開.ipynb檔 - 建議安裝 Anaconda，如有安裝 Anaconda 只需安裝以下套件
$ pip install selenium tldextract Pillow
pip
pip 是 Python 的套件管理系統，在部份系統裏面會用 pip3 代表 Python3 的版本，請各位依照自己的系統安裝 pip3 後，安裝以下 Python3 版本的套件
# 視情況而定, 使用 pip 或是 pip3
$ pip install requests beautifulsoup4 lxml Pillow selenium tldextract
Optional: 資料分析
沒有練習題但會有範例 code 可以執行，可自行選擇是否安裝 (如果安裝 wordcloud 時有問題，可能是沒有下載 visual studio，可以從 warining 中提供的網址下載安裝)
# Anaconda
$ pip install jieba wordcloud
# pip
$ pip3 install numpy pandas matplotlib scipy scikit-learn jieba wordcloud
請遵守別人的規則
有些網站會在目錄底下加上 robots.txt, 基本上這就是對方定義的爬蟲規則，請大家在練習爬蟲的時候要尊重對方的規則
Q&A
Q: 有哪些常用的 API
課堂中有說到，爬蟲只是一種得到資料的手段，如果對方有提供 API 就可以直接使用 API， API 通常對方都會幫你整理好資料格式，或是根據權限決定你可以獲取的資料內容
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