[top] / BTrees / Interfaces / IKeySequence
There are no attributes or fields specified.
__nonzero__()
Check if the collection is non-empty.
Return a true value if the collection is non-empty and a false value otherwise.
__getitem__(index)
Return the key in the given index position.
This allows iteration with for loops and use in functions, like map and list, that read sequences.
keys(min=None, max=None, excludemin=False, excludemax=False)
Return an IReadSequence containing the keys in the collection.
The type of the IReadSequence is not specified. It could be a list or a tuple or some other type.
All arguments are optional, and may be specified as keyword arguments, or by position.
If a min is specified, then output is constrained to keys greater than or equal to the given min, and, if excludemin is specified and true, is further constrained to keys strictly greater than min. A min value of None is ignored. If min is None or not specified, and excludemin is true, the smallest key is excluded.
If a max is specified, then output is constrained to keys less than or equal to the given max, and, if excludemax is specified and true, is further constrained to keys strictly less than max. A max value of None is ignored. If max is None or not specified, and excludemax is true, the largest key is excluded.
clear()
Remove all of the items from the collection.
minKey(key=None)
Return the minimum key.
If a key argument if provided and not None, return the smallest key that is greater than or equal to the argument. Raise an exception if no such key exists.
maxKey(key=None)
Return the maximum key.
If a key argument if provided and not None, return the largest key that is less than or equal to the argument. Raise an exception if no such key exists.
has_key(key)
Check whether the object has an item with the given key.
Return a true value if the key is present, else a false value.
__len__()
Return the number of items in the container.
There are no specific adapters registered for this interface.
There are no extended adapters registered for this interface.
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