In attempting to put together a very simple example to illustrate an issue I’m having with pyparsing, I have found that I can’t get my simple example to work – this example is barely more complex than Hello, World!

Here is my example code:

import pyparsing as pp
import textwrap as tw

text = (
    """
    A) Red
    B) Green
    C) Blue
    """
)

a = pp.AtLineStart("A)") + pp.Word(pp.alphas)
b = pp.AtLineStart("B)") + pp.Word(pp.alphas)
c = pp.AtLineStart("C)") + pp.Word(pp.alphas)

grammar = a + b + c

grammar.run_tests(tw.dedent(text).strip())

I would expect it to return ["A)", "Red", "B)", "Green", "C)", "Blue"] but instead I get:

A) Red
A) Red
      ^
ParseException: not found at line start, found end of text  (at char 6), (line:1, col:7)
FAIL: not found at line start, found end of text  (at char 6), (line:1, col:7)

B) Green
B) Green
^
ParseException: Expected 'A)', found 'B'  (at char 0), (line:1, col:1) 
FAIL: Expected 'A)', found 'B'  (at char 0), (line:1, col:1)

C) Blue
C) Blue
^
ParseException: Expected 'A)', found 'C'  (at char 0), (line:1, col:1)
FAIL: Expected 'A)', found 'C'  (at char 0), (line:1, col:1)

Why would it say it’s found end of text after the first line??? Why is it expecting A) after the first line???

(Note: textwrap.dedent() and strip() have no impact on the results of this script.)