CODEWITHSUNDEEP
pythonpython-2.7pyparsing
theAlse
theAlse

Reputation: 5747

pyparsing keyword, how does it work?

I have used pyparsing to parse a big chunk of text and get some numbers. The text I am parsing is something like this:

asdkjh                  1      120   203
kajshd                  230   2309  2309
Activated Attempts      230   2309  2309
Activated Attempts      230   2309  2309
aksjdh                               300
...

I needed to search for a string and catch all the values which follows right after the given string. The code I have written looks like this and it working fine.

returnValue= 0

integer = pyparsing.Word(pyparsing.nums).setParseAction(lambda toks: int(toks[0]))
attempted = integer.setResultsName("attempted")
text = "Activated Attempts"

row = text + attempted
table = pyparsing.ZeroOrMore(pyparsing.Group(row) | pyparsing.SkipTo(row).suppress())

attempteds = [row.asDict() for row in table.parseString(self.sendLine("lts_pm p"))]

for attempted in attempteds:
    returnValue+= attempted["attempted"]

return returnValue

In the case above it would return 460. The above function, searches for the given "Activated Attempts" and stores the numbers that is followed by that text, summarizes the numbers and returns.

However I need to add more search queries into the same script, and I tried:

text = pyparsing.Keyword("Activated Attempts") or pyparsing.Keyword("Non Attempts")

But the script only catches "Activated Attempts" and returns its number and ignores the second text completely. What is the use of Keyword if not this? I have also tried Literal but no success with that either!

Upvotes: 3

Views: 1562

Answers (1)

John
John

Reputation: 13699

from pyparsing import *

data = '''
asdkjh                  1      120   203
kajshd                  230   2309  2309
Activated Attempts      230   2309  2309
Activated Attempts      230   2309  2309
aksjdh                               300
'''

eventParser = Group(Word(alphas) + Optional(Word(alphas)))
rowParser = Group(eventParser + delimitedList(Word(nums),White(" ")))
tableParser = ZeroOrMore(rowParser)

def getValue(attemptsList, term):
    value = 0
    for attempt in attemptsList:
        if ' '.join(attempt[0]) == term:
            value += int(attempt[1])
    return value

attempts = getValue(tableParser.parseString(data), "Activated Attempts")
print attempts

Edit

From the docs

Keyword - similar to Literal, but must be immediately followed by whitespace, punctuation, or other non-keyword characters; prevents accidental matching of a non-keyword that happens to begin with a defined keyword.

Upvotes: 3

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