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codemee
codemee

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PyQuery 2.0 與 1.X 的差異

#python

我自己被 JQuery 荼毒極深, 所以很喜歡使用 PyQuery, 不過 PyQuery 2.0 和 1.X 版有一些改變, 如果沒注意, 程式執行一定會出錯。

要用 url 指名引數傳入網址

PyQuery 2.0 有一個關鍵的改變, 就是建立 PyQuery 物件時, 網址要用 url 指名引數傳入, 例如在 1.X 版中可以直接將網址傳入, 像是這樣寫：

>>> from pyquery import PyQuery as pq
>>> p = pq('https://flagtech.github.io/flag.txt')
>>> print(p.html())
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顯示結果如下：

<body><p>FLAG&#13;
  ______ _               _____ &#13;
 |  ____| |        /\   / ____|&#13;
 | |__  | |       /  \ | |  __ &#13;
 |  __| | |      / /\ \| | |_ |&#13;
 | |    | |____ / ____ \ |__| |&#13;
 |_|    |______/_/    \_\_____|&#13;
                               &#13;
                               </p></body>
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PyQuery 的建構方法中會自動判斷傳入的字串是不是網址。

但是在 2.0 中, 同樣的寫法會被當成是要以傳入引數內容建立 PyQuery 物件, 而不是要載入網頁的網址：

>>> from pyquery import PyQuery as pq
>>> p = pq('https://flagtech.github.io/flag.txt')
>>> print(p.html())
https://flagtech.github.io/flag.txt
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必須改成用 url 指名引數傳入網址：

>>> p = pq(url='https://flagtech.github.io/flag.txt')
>>> print(p.html())
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顯示結果如下：

<body><p>FLAG&#13;
  ______ _               _____ &#13;
 |  ____| |        /\   / ____|&#13;
 | |__  | |       /  \ | |  __ &#13;
 |  __| | |      / /\ \| | |_ |&#13;
 | |    | |____ / ____ \ |__| |&#13;
 |_|    |______/_/    \_\_____|&#13;
                               &#13;
                               </p></body>
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