id	summary	reporter	owner	description	type	status	priority	component	severity	resolution	keywords	cc
62	value token of single period ('.') is parsed incorrectly, throws wrong exception	sproaticus	xi	"A scalar value token consisting of just a period ('.') is interpreted as a float value.  When construct_yaml_float() creates a float using this value, it throws an uncaught !ValueError instead of yaml.YAMLError

(Also, what's PIL doing in the stack?  I didn't import it.)

{{{
>>> yaml.load('yaml: .')
Traceback (most recent call last):
  File ""<stdin>"", line 1, in <module>
  File ""/usr/lib/python2.5/site-packages/PIL/__init__.py"", line 66, in load
    
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 38, in get_data
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 46, in construct_document
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 394, in construct_yaml_map
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 207, in construct_mapping
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 132, in construct_mapping
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 87, in construct_object
  File ""build/bdist.linux-i686/egg/yaml/constructor.py"", line 281, in construct_yaml_float
ValueError: invalid literal for float(): .
}}}

Environment:
 * Python 2.5.1 (r251:54863, May  2 2007, 16:56:35) [GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
 * PyYAML-3.05-py2.5.egg"	defect	closed	normal	pyyaml	normal	fixed	ValueError, YAMLError