sdcflows.utils.bimap module¶

A bidirectional hashmap.

class sdcflows.utils.bimap.EstimatorRegistry(*args, **kwargs)[source]¶

Examples

>>> estimators = EstimatorRegistry()
>>> _ = estimators.add(("file3.txt", "file4.txt"))
>>> estimators.sources
['file3.txt', 'file4.txt']

>>> _ = estimators.add(("file1.txt", "file2.txt"))
>>> estimators.sources
['file1.txt', 'file2.txt', 'file3.txt', 'file4.txt']

>>> _ = estimators.add(("file3.txt", "file2.txt"))
>>> estimators.sources
['file1.txt', 'file2.txt', 'file3.txt', 'file4.txt']

>>> estimators.get_key("file3.txt")
('auto_00000', 'auto_00002')

>>> estimators.get_key("file5.txt")
()

class sdcflows.utils.bimap.bidict(*args, **kwargs)[source]¶

Bases: dict

A bidirectional hashmap.

>>> d = bidict({"a": 1, "b": 2}, c=3)
>>> d["a"]
1

>>> d[1]
'a'

>>> 2 in d
True

>>> "b" in d
True

>>> d["d"] = 4
>>> del d["d"]
>>> d["d"] = 4
>>> del d[4]
>>> d
{'a': 1, 'b': 2, 'c': 3}

>>> d["d"] = "d"  
Traceback (most recent call last):
TypeError: 'd' <> 'd' is a self-mapping

>>> d["d"]  
Traceback (most recent call last):
KeyError: 'd'

>>> d["b"] = None  
Traceback (most recent call last):
KeyError: 'b' is already in mapping

>>> d[1] = None  
Traceback (most recent call last):
KeyError: '1' is already a value in mapping

>>> d["d"] = 1  
Traceback (most recent call last):
ValueError: '1' is already in mapping

>>> d["d"] = "a"  
Traceback (most recent call last):
ValueError: 'a' is already a key in mapping

>>> d["unhashable val"] = []  
Traceback (most recent call last):
TypeError: value '[]' of unhashable type: 'list'

>>> d[list()] = 1  
Traceback (most recent call last):
TypeError: key '[]' of unhashable type: 'list'

>>> d.add("a new value")
'auto_00000'

>>> d["auto_00000"]
'a new value'

>>> d["auto_00001"] = "another value"
>>> d.add("a new value")  
Traceback (most recent call last):
ValueError: 'a new value' is already in mapping

>>> d.add("third value")
'auto_00002'

>>> d == bidict(reversed(list(d.items())))
True

>>> bidict({"a": 1, "b": 1})  
Traceback (most recent call last):
TypeError: Bidirectional dictionary cannot contain repeated values

>>> del d["e"]  
Traceback (most recent call last):
KeyError: 'e'

>>> list(d)
['a', 'b', 'c', 'auto_00000', 'auto_00001', 'auto_00002']

>>> list(d.values())
[1, 2, 3, 'a new value', 'another value', 'third value']

>>> d.clear()
>>> d
{}

add(value)[source]¶: Insert a new value in the bidict, generating an automatic key.