def test_drop_obs_column():
    adata = ad.AnnData(np.array(X_list), obs=obs_dict, dtype="int32")

    subset = adata[:2]
    assert subset.is_view
    # returns a copy of obs
    assert subset.obs.drop(columns=["oanno1"]).columns.tolist() == ["oanno2", "oanno3"]
    assert subset.is_view
    # would modify obs, so it should actualize subset and not modify adata
    subset.obs.drop(columns=["oanno1"], inplace=True)
    assert not subset.is_view
    assert subset.obs.columns.tolist() == ["oanno2", "oanno3"]

    assert adata.obs.columns.tolist() == ["oanno1", "oanno2", "oanno3"]
def email(self):
        """
        Shortcut property for finding the e-mail address or bot URL.
        """
        if "profile" in self._raw:
            email = self._raw["profile"].get("email")
        elif "bot_url" in self._raw:
            email = self._raw["bot_url"]
        else:
            email = None
        if not email:
            logging.debug("No email found for %s", self._raw.get("name"))
        return email