在Python中如何将string放在两行上？[副本]

Question

我对Python、PyCharm和Web API测试是全新的。

我正在尝试测试在Web API中出错时显示的错误消息。该错误消息有两部分，分别显示在两行上。

    wp_error = 'This page can\'t be saved.\n Some required information is missing.'

    # create new workspace and save it without filling up any information.
    self.test_mycode.click_and_wait(self.workspace_overview.new_workspace_button,
                                     self.new_workspace._save_button_locator)
    self.new_workspace.save_button.click()

    self.message.check_message('error', wp_error)

self = <class 'unittestzero.Assert'>
first = "This page can't be saved.
Some required information is missing."
second = "This page can't be saved.\n Some required information is missing."
.....

>       assert first == second, msg
E       AssertionError: None

Answer 1

如果：

first = """This page can't be saved.
Some required information is missing."""
second = "This page can't be saved.\n Some required information is missing."
assert first == second

失败，那么问题很可能是：

first  == "This page can't be saved.\nSome required information is missing."
second == "This page can't be saved.\n Some required information is missing."

即。在换行符后面的第二个部分中有一个额外的空格。（还要注意三个引号，以允许字符串跨行而不需要编译器抱怨，)

import re
FOLD_WHITESPACE = re.compile(r'\s+')

def oneline(s):
   return FOLD_WHITESPACE.sub(" ", s)

assert oneline(first) == oneline(second)

顺便说一句，如果您使用的是assert的对象调用版本，那么它可能被表述为：

Assert.equal(oneline(message.message_body.text),
             oneline(message_text))