Custom Query (121 matches)

Reported by rwb123@…, 7 years ago.

The following code produces bad yaml output, which subsequently dies in the yaml.load(). This is with pyyaml 3.0.3 on python 2.4.1.

import yaml

e = {"texas: '": 92.5}
yammy = yaml.dump(e)
print yammy
e2 = yaml.load(yammy)
print e2

The yaml output is:

$ python yamlbug2.py
{'texas: '': 92.5}

Traceback (most recent call last):
  File "yamlbug2.py", line 10, in ?
    e2 = yaml.load(yammy)
  File "/home/blahblah/dl/yaml/PyYAML-3.03/lib/yaml/__init__.py", line 61, in load
    return loader.get_data()
 ... etc.

Reported by sedie@…, 3 years ago.

The following YAML code is taken directly from an example given in the YAML 1.1 specification and fails to load with PyYAML, giving the error message: found unacceptable key (unhashable type: 'list').

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

? [ New York Yankees,
    Atlanta Braves ]
: [ 2001-07-02, 2001-08-12,
    2001-08-14 ]
...

The problem most likely arises because Python lists are not hashable and cannot be used as dict keys. A possible solution may be to detect this special case and coerce YAML !!seq types to Python tuples before constructing the dictionaries that they are a part of.

Reported by sgwong, 3 years ago.

Currently PyYAML only use python implementation although the libyaml available. The following simple changes on __init__.py should do: (I'm not sure whats the use of __with_libyaml__)

__version__ = '3.09'

try:
    from cyaml import *
    __with_libyaml__ = True
    Loader = CLoader
    Dumper = CDumper
except ImportError:
    __with_libyaml__ = False