nltk.FeatStructReader.fromstring¶

FeatStructReader.fromstring(s, fstruct=None)[source]¶

Convert a string representation of a feature structure (as displayed by repr) into a FeatStruct. This process imposes the following restrictions on the string representation:

• Feature names cannot contain any of the following: whitespace, parentheses, quote marks, equals signs, dashes, commas, and square brackets. Feature names may not begin with plus signs or minus signs.
• Only the following basic feature value are supported: strings, integers, variables, None, and unquoted alphanumeric strings.
• For reentrant values, the first mention must specify a reentrance identifier and a value; and any subsequent mentions must use arrows ('->') to reference the reentrance identifier.