ScannerError in fetch_more_tokens

[Takanao Endoh <djmchl@…>]

>>> import yaml
>>> yaml.load(" 'spam: %' ")
'spam: %'
>>> yaml.load(" spam: % ")
------------------------------------------------------------
Traceback (most recent call last):
  ...
  File "/Volumes/data/pylib/src/yaml/scanner.py", line 257, in fetch_more_tokens
    % ch.encode('utf-8'), self.get_mark())
ScannerError: while scanning for the next token
found character '%' that cannot start any token
  in "<string>", line 1, column 8:
     spam: % 
           ^

[anonymous]

Sorry, I missed.

>>> import yaml
>>> yaml.load(" spam: '%' ")
{'spam': '%'}
>>> yaml.load(" spam: % ")
------------------------------------------------------------
Traceback (most recent call last):
  ...
  File "/Volumes/data/pylib/src/yaml/scanner.py", line 257, in fetch_more_tokens
    % ch.encode('utf-8'), self.get_mark())
ScannerError: while scanning for the next token
found character '%' that cannot start any token
  in "<string>", line 1, column 8:
     spam: % 
           ^

[xi]

The error message speaks for itself: you cannot start a plain scalar with the % symbol. You need to quote the whole string with "..." or '...'.

See  http://yaml.org/spec/cvs/current.html#ns-plain-first-char%28c%29 and  http://yaml.org/spec/cvs/current.html#c-indicator