Mercurial > pygpibtoolkit / file comparison
comparison: tools.py
tools.py
- changeset 40
- 1bbea188a7e5
- parent 39
- 8becd52c2171
- child 41
- 9a453b2479c5
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| 39:8becd52c2171 | 40:1bbea188a7e5 |
|---|---|
| 1 # | |
| 2 """ | |
| 3 Helper functions and classes | |
| 4 """ | |
| 5 import re | |
| 6 | |
| 7 def str_num_cmp(s1,s2): | |
| 8 """ | |
| 9 string comparator function that will put 'toto_10' after 'toto_2' | |
| 10 Also works for strings like 'toto_1_et_23er25'. | |
| 11 """ | |
| 12 r = re.compile(r'((?<=\d)\D+|(?<=\D)\d+)') | |
| 13 r1= r.split(s1) | |
| 14 r2= r.split(s2) | |
| 15 r1=[not x.isdigit() and x or int(x) for x in r1 if x!=''] | |
| 16 r2=[not x.isdigit() and x or int(x) for x in r2 if x!=''] | |
| 17 return cmp(r1,r2) | |
| 18 | |
| 19 | |
| 20 class AbstractRegister(object): | |
| 21 _instance = None | |
| 22 _registered_type = None | |
| 23 def __new__(cls): | |
| 24 # implements a singleton | |
| 25 if cls._instance is None: | |
| 26 #debug('Instanciating %s', cls.__name__) | |
| 27 cls._instance = super(AbstractRegister, cls).__new__(cls) | |
| 28 cls._instance.registered = {} | |
| 29 cls._instance.accepts = set() | |
| 30 return cls._instance | |
| 31 | |
| 32 def add(self, cls): | |
| 33 assert issubclass(cls, self._registered_type) | |
| 34 if cls is self._registered_type: | |
| 35 return | |
| 36 if cls._accepts is None: | |
| 37 return | |
| 38 #assert isinstance(cls._accepts, (basestring, tuple)) | |
| 39 | |
| 40 #debug("Registerered %s for %s", cls.__name__) | |
| 41 if not isinstance(cls._accepts, tuple): | |
| 42 cls._accepts = (cls._accepts,) | |
| 43 for key in cls._accepts: | |
| 44 key = self._get_typ(key) | |
| 45 #debug(" new key = %s", key) | |
| 46 self.registered.setdefault(key, []).append(cls) | |
| 47 self.accepts.add(key) | |
| 48 | |
| 49 def _get_typ(self, typ): | |
| 50 if not isinstance(typ, basestring): | |
| 51 if not isinstance(typ, type): | |
| 52 return None | |
| 53 typ = typ.__name__ | |
| 54 return typ | |
| 55 | |
| 56 def __contains__(self, val): | |
| 57 val = self._get_typ(val) | |
| 58 return val in self.accepts | |
| 59 | |
| 60 def get_class(self, typ): | |
| 61 item = typ | |
| 62 if not isinstance(typ, type): | |
| 63 typ = typ.__class__ | |
| 64 name = typ.__name__ | |
| 65 #debug("Looking a widget for %s", typ.__name__) | |
| 66 orig_typ = typ | |
| 67 while typ is not None: | |
| 68 if typ.__name__ in self.registered: | |
| 69 for w in self.registered[typ.__name__]: | |
| 70 if w._filter is None or w._filter(item): | |
| 71 #debug("Widget for %s is %s", typ.__name__, w) | |
| 72 return w#self.registered[typ.__name__] | |
| 73 if typ.__bases__: | |
| 74 typ = typ.__bases__[0] | |
| 75 if typ == object: | |
| 76 typ = None | |
| 77 elif typ.__name__ in ("ObjectItem_", "AbstractListItem_"): | |
| 78 typ = orig_typ._type | |
| 79 else: | |
| 80 typ = None | |
| 81 raise ValueError('No registered class for %s' % (name)) |
