type ChunkRuleWithContext
source code
object --+
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RegexpChunkRule --+
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ChunkRuleWithContext
A rule specifying how to add chunks to a ChunkString,
using three matching tag patterns: one for the left context, one for the
chunk, and one for the right context. When applied to a
ChunkString, it will find any substring that matches the
chunk tag pattern, is surrounded by substrings that match the two context
patterns, and is not already part of a chunk; and create a new chunk
containing the substring that matched the chunk tag pattern.
Caveat: Both the left and right context are consumed when this rule
matches; therefore, if you need to find overlapping matches, you will
need to apply your rule more than once.
__init__(self,
left_context_tag_pattern,
chunk_tag_pattern,
right_context_tag_pattern,
descr)
(Constructor)
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Construct a new ChunkRuleWithContext.
- Parameters:
left_context_tag_pattern (string) - A tag pattern that must match the left context of
chunk_tag_pattern for this rule to apply.chunk_tag_pattern (string) - A tag pattern that must match for this rule to apply. If the
rule does apply, then this pattern also identifies the substring
that will be made into a chunk.right_context_tag_pattern (string) - A tag pattern that must match the right context of
chunk_tag_pattern for this rule to apply.descr (string) - A short description of the purpose and/or effect of this rule. - Overrides:
RegexpChunkRule.__init__
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- Returns:
string
- A string representation of this rule. This string representation
has the form:
<ChunkRuleWithContext: '<IN>', '<NN>', '<DT>'>
Note that this representation does not include the description
string; that string can be accessed separately with the
descr method.
- Overrides:
RegexpChunkRule.__repr__
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