Ciao a tutti, seguendo le indicazioni trovate qui: http://nltk.org/book/ch10
ho scritto le seguenti righe di codice: lp = nltk.LogicParser() e = lp.parse(r'\x.(walk(x) & chew_gum(x))') print output: ValueError: invalid \x escape Nel libro "Learning Python:5th Edition" ho trovato: "Python allows strings to be enclosed in single or double quote characters—they mean the same thing but allow the other type of quote to be embedded with an escape (most programmers prefer single quotes). It also allows multiline string literals enclosed in triple quotes (single or double)—when this form is used, all the lines are concatenated together, and end-of-line characters are added where line breaks appear. This is a minor syntactic convenience, but it’s useful for embedding things like multiline HTML, XML, or JSON code in a Python script. Python also supports a raw string literal that turns off the backslash escape mechanism. Such literals start with the letter r and are useful for strings like directory paths on Windows (e.g., r'C:\text\new')." Per cui sembrerebbe che abbia scritto correttamente. Consigli e suggerimenti per risolvere la situazione (ValueError: invalid \x escape)? Vi ringrazio per l'aiuto.. Marco _______________________________________________ Python mailing list Python@lists.python.it http://lists.python.it/mailman/listinfo/python
