ruamel.yaml读取特殊字符触发ScannerError解析错误求助

The error you're hitting occurs because % is a reserved character in YAML—it’s used to define directives like %YAML 1.2 at the start of a file. When the parser encounters an unquoted % elsewhere, it misinterprets it as an attempt to start a new directive, triggering the scanner error.

Solution: Quote the '%' Value #

Wrap the % in single or double quotes to explicitly mark it as a literal string. Here’s your corrected YAML structure:

- !Message
  Name: my message
  Messages:
    - !Message name: InputMsg1
    - !Variable
      Name: control_word
      Length: 8
      Type: Signed
      Unit: '%' # Parser error resolved

Alternative: Use Double Quotes #

Double quotes work just as well if you prefer that syntax:

Unit: "%"

Why This Fixes the Issue #

Quoting reserved characters tells YAML to treat them as plain text instead of special syntax. This is the standard approach for using characters like %, #, or : as literal values in YAML.

内容的提问来源于stack exchange，提问作者Gerhard B