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iPythonで実装のソースコードを見る

Last updated at Posted at 2014-05-08

超具体的に言うと、WebDriverのPython APIでByを使うんですがこれが何宣言してんのか知りたい。By.NAMEは覚えたけどBy.CLASS_NAMEなのかBy.CLASSなのかどっちだっけ。

……というときにlocate '/usr*python*webdriver*by*'とかやるの、なんだかアホいなぁと。

> locate '/usr*python*/webdriver*by*'
/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/by.py
/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/by.pyc
(viewとかemacsで見る)

豆知識としてipythonの方法を紹介します。?を2個つけるだけです。

In [1]> from selenium.webdriver.common.by import By
In [2]> By??
Type:        type
String form: <class 'selenium.webdriver.common.by.By'>
File:        /usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/by.py
Source:
class By(object):
    """
    Set of supported locator strategies.
    """

    ID = "id"
    XPATH = "xpath"
    LINK_TEXT = "link text"
    PARTIAL_LINK_TEXT = "partial link text"
    NAME = "name"
    TAG_NAME = "tag name"
    CLASS_NAME = "class name"
    CSS_SELECTOR = "css selector"

    @classmethod
    def is_valid(cls, by):
        for attr in dir(cls):
            if by == getattr(cls, attr):
                return True
        return False

『Pythonによるデータ分析入門』という本で何故かipythonの入門記事がありまして、自分の使ってるツール知らないのは恥だぁと改めて思いました。

なおiPythonのチートシートは以下の通り。

おまけ

これも同書籍からですが、地味に衝撃を覚えたので参考まで (python-matplotlib パッケージ等が先に必要です)

> ipython --pylab
In [1]> plot(np.random.randn(100).cumsum())

どう動作するかは https://www.youtube.com/watch?v=BrDJssegqwo からどうぞ

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