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-# removeLineBreaks.py
-#
-# Demonstration of the pyparsing module, converting text files
-# with hard line-breaks to text files with line breaks only
-# between paragraphs. (Helps when converting downloads from Project
-# Gutenberg - http://www.gutenberg.org - to import to word processing apps
-# that can reformat paragraphs once hard line-breaks are removed.)
-#
-# Uses parse actions and transformString to remove unwanted line breaks,
-# and to double up line breaks between paragraphs.
-#
-# Copyright 2006, by Paul McGuire
-#
-from pyparsing import *
-
-# define an expression for the body of a line of text - use a parse action to reject any
-# empty lines
-def mustBeNonBlank(s,l,t):
- if not t[0]:
- raise ParseException(s,l,"line body can't be empty")
-lineBody = SkipTo(lineEnd).setParseAction(mustBeNonBlank)
-
-# now define a line with a trailing lineEnd, to be replaced with a space character
-textLine = lineBody + Suppress(lineEnd).setParseAction(replaceWith(" "))
-
-# define a paragraph, with a separating lineEnd, to be replaced with a double newline
-para = OneOrMore(textLine) + Suppress(lineEnd).setParseAction(replaceWith("\n\n"))
-
-
-# run a test
-test = """
- Now is the
- time for
- all
- good men
- to come to
-
- the aid of their
- country.
-"""
-print(para.transformString(test))
-
-# process an entire file
-z = para.transformString(file("Successful Methods of Public Speaking.txt").read())
-file("Successful Methods of Public Speaking(2).txt","w").write(z)