The Most Wanted Letter
你会得到一个文本，其中包含不同的英文字母和标点符号。
你应该找出文本中出现频率最高的字母。返回的字母必须是小写字母。
在检查最想要的字母时，大小写并不重要，所以为了你的搜索目的、
"A" == "a"。
确保你不计算标点符号、数字和空白处，只计算字母。
如果你有两个或多个频率相同的字母、 那么返回在拉丁字母表中排在第一位的字母。 例如 -- "one "包含 "o"、"n"、"e "各一次，因此我们选择 "e"。
输入：一个用于分析的字符串的文本 (str).
输出：小写字母中出现频率最高的字母为一个字符串 (str).
例子：
assert checkio("Hello World!") == "l"
assert...
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
checkio sync
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium
Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.
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