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| author | Cengiz Kaygusuz <cngkaygusuz@gmail.com> | 2017-11-20 20:46:39 -0500 |
|---|---|---|
| committer | Cengiz Kaygusuz <cngkaygusuz@gmail.com> | 2017-11-20 20:46:39 -0500 |
| commit | 27e183a78c8062ed7c2bbb91655a5e56cd697bba (patch) | |
| tree | 88fd355a0cc6da4c130582e092d702836596cbb2 /examples/linenoExample.py | |
| parent | 4ba589cf13588e90992e23deb5a9784340efd2cc (diff) | |
| download | pyparsing-git-27e183a78c8062ed7c2bbb91655a5e56cd697bba.tar.gz | |
Move src to root
Diffstat (limited to 'examples/linenoExample.py')
| -rw-r--r-- | examples/linenoExample.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/examples/linenoExample.py b/examples/linenoExample.py new file mode 100644 index 0000000..1186f48 --- /dev/null +++ b/examples/linenoExample.py @@ -0,0 +1,49 @@ +#
+# linenoExample.py
+#
+# an example of using the location value returned by pyparsing to
+# extract the line and column number of the location of the matched text,
+# or to extract the entire line of text.
+#
+# Copyright (c) 2006, Paul McGuire
+#
+from pyparsing import *
+
+data = """Now is the time
+for all good men
+to come to the aid
+of their country."""
+
+# demonstrate use of lineno, line, and col in a parse action
+def reportLongWords(st,locn,toks):
+ word = toks[0]
+ if len(word) > 3:
+ print("Found '%s' on line %d at column %d" % (word, lineno(locn,st), col(locn,st)))
+ print("The full line of text was:")
+ print("'%s'" % line(locn,st))
+ print((" "*col(locn,st))+" ^")
+ print()
+
+wd = Word(alphas).setParseAction( reportLongWords )
+OneOrMore(wd).parseString(data)
+
+
+# demonstrate returning an object from a parse action, containing more information
+# than just the matching token text
+class Token(object):
+ def __init__(self, st, locn, tokString):
+ self.tokenString = tokString
+ self.locn = locn
+ self.sourceLine = line(locn,st)
+ self.lineNo = lineno(locn,st)
+ self.col = col(locn,st)
+ def __str__(self):
+ return "%(tokenString)s (line: %(lineNo)d, col: %(col)d)" % self.__dict__
+
+def createTokenObject(st,locn,toks):
+ return Token(st,locn, toks[0])
+
+wd = Word(alphas).setParseAction( createTokenObject )
+
+for tokenObj in OneOrMore(wd).parseString(data):
+ print(tokenObj)
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