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lowercase_btree.py
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Thu, May 16, 02:31

lowercase_btree.py
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#!/usr/bin/env python3
from . import bdlogging
################################################################
import BTrees
import persistent
################################################################
print = bdlogging.invalidPrint
logger = bdlogging.getLogger(__name__)
BTree = BTrees.OOBTree.BTree
################################################################
class _LowerCaseBTree(object):
def __init__(self, key_string='key_'):
self.entries = BTree()
self.key_string = key_string
def __delitem__(self, attr):
key = attr
if isinstance(key, str):
key = key.lower()
del self.entries[key]
def __getattr__(self, attr):
if 'entries' not in self.__dict__:
raise AttributeError(attr)
key = attr.lower()
_key = key
# logger.error(self.__dict__)
key_string = self.__dict__['key_string']
if isinstance(key, str) and key.startswith(key_string):
_key = key[len(key_string):]
# logger.error(_key)
try:
_key = int(_key)
except ValueError:
pass
# logger.error(_key)
try:
if _key in self.entries:
return self.entries[_key]
elif key in self.entries:
return self.entries[key]
else:
raise AttributeError(attr)
except TypeError:
# logger.error(attr)
raise AttributeError(attr)
def __setattr__(self, attr, value):
if persistent.Persistent._p_setattr(self, attr, value):
return
self._p_changed = True
key = attr.lower()
if key == 'entries' or key == 'key_string':
try:
object.__setattr__(self, key, value)
except TypeError:
persistent.Persistent.__setattr__(self, key, value)
# logger.error(f"set attr {attr} {value}")
entries = self.entries
# logger.error(f"set attr {[ e for e in entries.keys()]}")
if key in entries:
# logger.error(f"set attr in entries {attr} {value}")
self.__setitem__(attr, value)
self.entries._p_changed = True
else:
try:
object.__setattr__(self, attr, value)
except TypeError:
persistent.Persistent.__setattr__(self, attr, value)
def __getitem__(self, index):
if isinstance(index, str):
index = index.lower()
return self.entries[index]
def keys(self):
return self.entries.keys()
def __iter__(self):
return self.entries.__iter__()
def __setitem__(self, index, value):
if isinstance(index, str):
index = index.lower()
self.entries[index] = value
def items(self):
# logger.error(f'{[e for e in self.entries.items()]}')
return self.entries.items()
def __deepcopy__(self, memo):
cp = self.__class__()
for k, v in self.entries.items():
cp.entries[k] = v
return cp
def setEntries(self, params):
for p, val in params.items():
if p in self.types:
self.entries[p] = val
def __dir__(self):
def valid_start_character(_str):
return not _str[0].isdigit()
return ([e for e in self.entries.keys() if type(e) == str and valid_start_character(e)] +
[f'{self.key_string}{e}' for e in self.entries.keys() if type(e) == str and not valid_start_character(e)] +
[f'{self.key_string}{e}' for e in self.entries.keys()if type(e) == int])
################################################################
class PersistentLowerCaseBTree(persistent.Persistent, _LowerCaseBTree):
def __init__(self, *args, **kwargs):
persistent.Persistent.__init__(self)
_LowerCaseBTree.__init__(self, *args, **kwargs)

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