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Dir : ~/opt/gsutil/third_party/pyparsing/examples/

View File Name : listAllMatches.py

# listAllMatches.py
#
# Sample program showing how/when to use listAllMatches to get all matching tokens in a results name.
#
# copyright 2006, Paul McGuire
#

from pyparsing import oneOf, OneOrMore, printables, StringEnd

test = "The quick brown fox named 'Aloysius' lives at 123 Main Street (and jumps over lazy dogs in his spare time)."
nonAlphas = [c for c in printables if not c.isalpha()]

print("Extract vowels, consonants, and special characters from this test string:")
print("'" + test + "'")
print("")

print("Define grammar using normal results names")
print("(only last matching symbol is saved)")
vowels = oneOf(list("aeiouy"), caseless=True)("vowels")
cons = oneOf(list("bcdfghjklmnpqrstvwxz"), caseless=True)("cons")
other = oneOf(nonAlphas)("others")
letters = OneOrMore(cons | vowels | other) + StringEnd()

results = letters.parseString(test)
print(results)
print(results.vowels)
print(results.cons)
print(results.others)
print("")


print("Define grammar using results names, with listAllMatches=True")
print("(all matching symbols are saved)")
vowels = oneOf(list("aeiouy"), caseless=True)("vowels*")
cons = oneOf(list("bcdfghjklmnpqrstvwxz"), caseless=True)("cons*")
other = oneOf(nonAlphas)("others*")

letters = OneOrMore(cons | vowels | other)

results = letters.parseString(test, parseAll=True)
print(results)
print(sorted(set(results)))
print("")
print(results.vowels)
print(sorted(set(results.vowels)))
print("")
print(results.cons)
print(sorted(set(results.cons)))
print("")
print(results.others)
print(sorted(set(results.others)))