在Python中解析非结构化文本

这是对pyparsing解决方案的第一次尝试(在pyparsing pastebin上易于复制的代码).根据交错的评论,浏览单独的部分.

data = """\
. 55 MORILLO ZONE VIII,
BARANGAY ZONE VIII
(POB.), LUISIANA, LAGROS
F
01/16/1952
ALOMO, TERESITA CABALLES
3412-00000-A1652TCA2
12
. 22 FABRICANTE ST. ZONE
VIII LUISIANA LAGROS,
BARANGAY ZONE VIII
(POB.), LUISIANA, LAGROS
M
10/14/1967
AMURAO, CALIXTO MANALO13
"""

from pyparsing import LineEnd, oneOf, Word, nums, Combine, restOfLine, \
    alphanums, Suppress, empty, originalTextFor, OneOrMore, alphas, \
    Group, ZeroOrMore

NL = LineEnd().suppress()
gender = oneOf("M F")
integer = Word(nums)
date = Combine(integer + '/' + integer + '/' + integer)

# define the simple line definitions
gender_line = gender("sex") + NL
dob_line = date("DOB") + NL
name_line = restOfLine("name") + NL
id_line = Word(alphanums+"-")("ID") + NL
recnum_line = integer("recnum") + NL

# define forms of address lines
first_addr_line = Suppress('.') + empty + restOfLine + NL
# a subsequent address line is any line that is not a gender definition
subsq_addr_line = ~(gender_line) + restOfLine + NL

# a line with a name and a recnum combined, if there is no ID
name_recnum_line = originalTextFor(OneOrMore(Word(alphas+',')))("name") + \
    integer("recnum") + NL

# defining the form of an overall record, either with or without an ID
record = Group((first_addr_line + ZeroOrMore(subsq_addr_line))("address") + 
    gender_line + 
    dob_line +
    ((name_line +
        id_line + 
        recnum_line) |
      name_recnum_line))

# parse data
records = OneOrMore(record).parseString(data)

# output the desired results (note that address is actually a list of lines)
for rec in records:
    if rec.ID:
        print "%(name)s, %(ID)s, %(address)s, %(sex)s, %(DOB)s" % rec
    else:
        print "%(name)s, , %(address)s, %(sex)s, %(DOB)s" % rec
print

# how to access the individual fields of the parsed record
for rec in records:
    print rec.dump()
    print rec.name, 'is', rec.sex
    print

打印:

ALOMO, TERESITA CABALLES, 3412-00000-A1652TCA2, ['55 MORILLO ZONE VIII,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS'], F, 01/16/1952
AMURAO, CALIXTO MANALO, , ['22 FABRICANTE ST. ZONE', 'VIII LUISIANA LAGROS,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS'], M, 10/14/1967

['55 MORILLO ZONE VIII,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS', 'F', '01/16/1952', 'ALOMO, TERESITA CABALLES', '3412-00000-A1652TCA2', '12']
- DOB: 01/16/1952
- ID: 3412-00000-A1652TCA2
- address: ['55 MORILLO ZONE VIII,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS']
- name: ALOMO, TERESITA CABALLES
- recnum: 12
- sex: F
ALOMO, TERESITA CABALLES is F

['22 FABRICANTE ST. ZONE', 'VIII LUISIANA LAGROS,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS', 'M', '10/14/1967', 'AMURAO, CALIXTO MANALO', '13']
- DOB: 10/14/1967
- address: ['22 FABRICANTE ST. ZONE', 'VIII LUISIANA LAGROS,', 'BARANGAY ZONE VIII', '(POB.), LUISIANA, LAGROS']
- name: AMURAO, CALIXTO MANALO
- recnum: 13
- sex: M
AMURAO, CALIXTO MANALO is M