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Ticket Resolution Summary Owner Reporter
#170 fixed PyYAML 3.09 + Python 2.7 — easy_install installation broken, binary installer absent xi anonymous

Reported by anonymous, 4 years ago.

Description
C:\Python27\Scripts>easy_install.exe pyyaml
install_dir c:\Python27\Lib\site-packages\
Searching for pyyaml
Reading http://pypi.python.org/simple/pyyaml/
Reading http://pyyaml.org/wiki/PyYAML
Best match: PyYAML 3.09
Downloading http://pyyaml.org/download/pyyaml/PyYAML-3.09.zip
Processing PyYAML-3.09.zip
Running PyYAML-3.09\setup.py -q bdist_egg --dist-dir d:\temp\easy_install-02p1z8\PyYAML-3.09\egg-dist-tmp-6im7x1
Creating lexicon...
Done (0.03 seconds)
error: Setup script exited with error: SandboxViolation: open('c:\\Python27\\lib\\site-packages\\pyrex-0.9.9-py2.7.egg\\Pyrex\\C
ompiler\\Lexicon.pickle', 'wb') {}

The package setup script has attempted to modify files on your system
that are not within the EasyInstall build area, and has been aborted.

This package cannot be safely installed by EasyInstall, and may not
support alternate installation locations even if you run its setup
script by hand.  Please inform the package's author and the EasyInstall
maintainers to find out if a fix or workaround is available.
#68 wontfix PyYAML don't load datetime objects dumped with PySyck xi miki@…

Reported by miki@…, 7 years ago.

Description
>>> from datetime import datetime
>>> now = datetime.now()
>>> import syck
>>> a = {"t": now}
>>> yaml.load(syck.dump(a))

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    lib.yaml.load(syck.dump(a))
  File "yaml/__init__.py", line 66, in load
  File "yaml/constructor.py", line 38, in get_data
  File "yaml/constructor.py", line 46, in construct_document
  File "yaml/constructor.py", line 394, in construct_yaml_map
  File "yaml/constructor.py", line 207, in construct_mapping
  File "yaml/constructor.py", line 132, in construct_mapping
  File "yaml/constructor.py", line 87, in construct_object
  File "yaml/constructor.py", line 410, in construct_undefined
ConstructorError: could not determine a constructor for the tag '!timestamp'
  in "<string>", line 2, column 4:
    t: !timestamp 2007-10-19T14:08:44.5 ... 
       ^
#169 wontfix PyYAML fails to load mapping keys of sequence type xi sedie@…

Reported by sedie@…, 4 years ago.

Description

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.

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