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Asked: 2026-06-11T08:39:27+00:00

I am trying to use pyparsing for the first time. My parser is not

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I am trying to use pyparsing for the first time.
My parser is not doing what I hope it would do, could someone please check and see what is wrong. I am trying to embedd OneOrMore within OneOrMore, which I think should work fine but it is not.

below is the whole code:

import pyparsing

status = """
    sale number       : 11/7 
    NAME               ID    PAWN    PRICE    TIME         %C     STATE     START/STOP
    cross-cu-1       1055       1    106284K  07:49:36.19  25.05%   run          1d01h
    cross-cu-2        918       1    104708K  07:38:19.08  24.02%   run          1d01h
    sale number       : 11/8 
    NAME               ID    PAWN    PRICE    TIME         %C     STATE     START/STOP
    cross-cu-3       1055       1    106284K  07:49:36.19  25.05%   run          1d01h
    cross-cu-4        918       1    104708K  07:38:19.08  24.02%   run          1d01h
    """

integer = pyparsing.Word(pyparsing.nums).setParseAction(lambda toks: int(toks[0]))
decimal = pyparsing.Word(pyparsing.nums + ".").setParseAction(lambda toks: float(toks[0]))
wordSuppress = pyparsing.Suppress(pyparsing.Word(pyparsing.alphas))
endOfLine = pyparsing.LineEnd().suppress()
colon = pyparsing.Suppress(":")

saleNumber = pyparsing.Regex("\d{2}\/\d{1}").setResultsName("saleNumber")
lineSuppress = pyparsing.Regex("NAME.*STOP") + endOfLine
saleRow = wordSuppress + wordSuppress + colon + saleNumber + endOfLine

name = pyparsing.Regex("cross-cu-\d").setResultsName("name")
id = integer.setResultsName("id")
pawn = integer.setResultsName("pawn")
price = integer.setResultsName("price") + "K"
time = pyparsing.Regex("\d{2}:\d{2}:\d{2}.\d{2}").setResultsName("time")
c = decimal.setResultsName("c") + "%"
state = pyparsing.Word(pyparsing.alphas).setResultsName("state")
startStop = pyparsing.Word(pyparsing.alphanums).setResultsName("startStop")
row = name + id + pawn + price + time + c + state + startStop + endOfLine

table = pyparsing.OneOrMore(pyparsing.Group(saleRow + lineSuppress.suppress() + (pyparsing.OneOrMore(pyparsing.Group(row) | pyparsing.SkipTo(row).suppress())) ) | pyparsing.SkipTo(saleRow).suppress())

resultDic = [x.asDict() for x in table.parseString(status)]
print resultDic

It returns only [{'saleNumber': '11/7'}]
I was hoping to get a list of dic like this:

[{ {'saleNumber': '11/7'},{ elements in cross-cu-1 line, elements in cross-cu-2 line } },
 { {'saleNumber': '11/8'},{ elements in cross-cu-3 line, elements in cross-cu-4 line } }]

Any help is appreciated!
Please don´t suggest other ways of implementing this output! I am trying to learn pyparsing as well!

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1 Answer

  1. Editorial Team

    In this case pyparsing is probably overkill. Why don’t you simply read the file line by line and then parse the results?

    The code would look like this:

    EDIT: I have updated the code to follow your example more closely.

    from collections import defaultdict

    status = """
sale number       : 11/7
NAME               ID    PAWN    PRICE    TIME         %C     STATE     START/STOP
cross-cu-1       1055       1    106284K  07:49:36.19  25.05%   run          1d01h
cross-cu-2        918       1    104708K  07:38:19.08  24.02%   run          1d01h
sale number       : 11/8
NAME               ID    PAWN    PRICE    TIME         %C     STATE     START/STOP
cross-cu-3       1055       1    106284K  07:49:36.19  25.05%   run          1d01h
cross-cu-4        918       1    104708K  07:38:19.08  24.02%   run          1d01h
"""

sale_number = ''

sales = defaultdict(list)

for line in status.split('\n'):
    line = line.strip()
    if line.startswith("NAME"):
         continue
    elif line.startswith("sale number"):
         sale_number = line.split(':')[1].strip()
    elif not line or line.isspace() :
         continue
    else:
         # you can also use a regular expression here
         sales[sale_number].append(line.split())

for sale in sales:
    print sale, sales[sale]
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