CODEWITHSUNDEEP
pythonparsingpretty-printpyparsingparse-tree
Nordlöw
Nordlöw

Reputation: 12138

Pretty-Printing PyParsing Trees

Have anyone implemented pretty printing (preferrably using Python's builtin pprint module) of parse-trees outputted from PyParsing preferrably with indentation and alignment?

Upvotes: 3

Views: 1035

Answers (1)

greg.k
greg.k

Reputation: 33

You can use json for this.

import json
class PyParseEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, ParseResults):
            x = obj.asDict()
            if x.keys():
                obj = x
            else:
                x = obj.asList()
                if len(x) == 1:
                    obj = x[0]
                else:
                    obj = x 
        else:
            obj = super(PyParseEncoder, self).default(obj)
        return obj

And then

print json.dumps(parseresult, cls=PyParseEncoder, sort_keys=False, indent=2)

If you are getting error from json.dumps just add additional handler to encoder for specific data type.

Upvotes: 1

Related Questions