用户名是由字母数字和下划线空格组成。
有效的名称只能包含小写字母、数字、点号、下划线和连字符。
A valid name can contain only lowercase letters, Numbers, periods, underscores, and dashes.
类名可以包含字母、数字和下划线字符的任何组合，但不能以数字打头。
The class name can contain any combination of letters and Numbers, as well as the underscore character, but cannot begin with a number.
变量名应由26个大小写字母(A..Z,a..z),10个数字(0..9),和_(下划线)组成。
Names should be formed from the 26 upper and lower case letters (A .. Z, a .. z), the 10 digits (0 .. 9), and _ (underbar).
必须只包含Unicode字母、下划线和Unicode数字。
Must only contain Unicode letters, underscore characters, and Unicode digits.
Python的变量名称约定与php类似：您在创建变量名时只能使用字母、数字和下划线(_)。
Python variable name conventions are similar to PHP: You can only use letters, Numbers, and the underscore character (_) when creating a variable name.
创建名称时可以使用英文字母、数字和特殊字符，比如下划线(_)。
The names you create can contain alphabetic characters, Numbers, and special characters such as underscores (_). Here are a few things to note about your naming.
默认情况下，它仅匹配“关键字”字符序列(数字、字母和下划线)，除了与光标左边进行匹配之外，它对上下文没有深刻的理解。
By default, it matches only sequences of "keyword" characters (alphanumerics and underscore), and it has no deep sense of context beyond matching what's immediately to the left of the cursor.
变量名称，即它的标识符，可由字母、数字和下划线构成。
The name of a variable, its identifier, can be composed of letters, digits, and the underscore character.
每个标识符都是字母、数字和下划线的非空序列，且序列不能以数字开头。
Each identifier is a nonempty sequence of letters, digits, and underscores that must not begin with a digit.
网站名称只能包含字母、数字、句点、连字符、下划线和空格。请输入其他名称。
Web names can only contain letters, Numbers, periods, dashes, underscores and Spaces. Please enter a different name.
“，”无效的文件夹名。请使用字母和数字，下划线和破折号。
Invalid folder name. Please, use alphanumeric characters, underscores and dashes.
“，”无效的文件夹名。请使用字母和数字，下划线和破折号。
Invalid folder name. Please, use alphanumeric characters, underscores and dashes.
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