匹配非空行与pyparsing

Question

我正在尝试创建一个小应用程序,用于pyparsing从另一个程序生成的文件中提取数据.

这些文件具有以下格式.

SOME_KEYWORD:
line 1
line 2
line 3
line 4

ANOTHER_KEYWORD:
line a
line b
line c

我怎样才能构建有助于提取的语法line 1,line 2... line 4和line a.. line c？我正在尝试制作这样的结构

Grammar = Keyword("SOME_KEYWORD:").supress() + NonEmptyLines + EmptyLine.supress() +\
         Keyword("ANOTHER_KEYWORD:").supress() + NonEmptyLines + EmptyLine.supress()

但我不知道如何定义NonEmptyLines和EmptyLine.谢谢.

Answer 1

我接受它:

    from pyparsing import *

    # matches and removes end of line
    EOL = LineEnd().suppress()

    # line starts, anything follows until EOL, fails on blank lines,
    line = LineStart() + SkipTo(LineEnd(), failOn=LineStart()+LineEnd()) + EOL

    lines = OneOrMore(line)

    # Group keyword probably helps grouping these items together, you can remove it
    parser = Keyword("SOME_KEYWORD:") + EOL + Group(lines) + Keyword("ANOTHER_KEYWORD:") + EOL + Group(lines)
    result = parser.parseFile('data.txt')
    print result

结果是:

['SOME_KEYWORD:', ['line 1', 'line 2', 'line 3', 'line 4'], 'ANOTHER_KEYWORD:', ['line a', 'line b', 'line c']]