Custom Query (121 matches)

Reported by clay@…, 5 years ago.

The YAML specification suggests that a mapping can have a key made of more than one item, as in

? - Detroit Tigers
  - Chicago cubs
:
  - 2001-07-23

However, when that data is imported via yaml.load(), PyYAML exits with a yaml.constructor.ConstructorError?, saying "found unacceptable key (list objects are unhashable)"

Is there a way to force multi-value keys to be processed as tuples instead of lists?

Reported by anonymous, 5 years ago.

quote from the documentation:

>>> class Monster(yaml.YAMLObject):
...     yaml_tag = u'!Monster'
...     def __init__(self, name, hp, ac, attacks):
...         self.name = name
...         self.hp = hp
...         self.ac = ac
...         self.attacks = attacks
...     def __repr__(self):
...         return "%s(name=%r, hp=%r, ac=%r, attacks=%r)" % (
...             self.__class__.__name__, self.name, self.hp, self.ac, self.attacks)

>>> yaml.load("""
... --- !Monster
... name: Cave spider
... hp: [2,6]    # 2d6
... ac: 16
... attacks: [BITE, HURT]
... """)

the thing is, yaml.load ignores the __init__ method of the Monster class. it doesn't even matter if it's there at all. in yaml.load you can specify aditional variables and they get added to the object. intended behaviour?

Reported by oscar.ostlund@…, 5 years ago.

I am trying to use yaml as a communication language between processes that are connected through sockets. When I open sockets, I use non blocking sockets. Thus when libyaml tries to read the file with fread, it returns an error. Indeed, as the non blocking flag is set, when there is nothing more to read, the fread call returns EWOULDBLOCK.

As a hack, I have modified the yaml_file_read_handler function to return 1 if errno == EWOULDBLOCK and !ferror in the other cases...

What do you think ?

Thanks for your help

Oscar