testre_mwichmann.py

import re 

x1 = """\
Traceback (most recent call last):
  File "<stdin>", line 9, in <module>
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 753, in run
    super().run(**kw)
  File "/home/mats/github/scons/testing/framework/TestCmd.py", line 1653, in run
    p = self.start(program=program,
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 696, in start
    raise e
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 679, in start
    return super().start(program, interpreter, arguments,
  File "<stdin>", line 4, in raise_exception
TypeError: forced TypeError
"""

x2 = """\
Traceback (most recent call last):
  File "<stdin>", line 9, in <module>
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 753, in run
    super().run(**kw)
  File "/home/mats/github/scons/testing/framework/TestCmd.py", line 1653, in run
    p = self.start(program=program,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 696, in start
    raise e
  File "/home/mats/github/scons/testing/framework/TestCommon.py", line 679, in start
    return super().start(program, interpreter, arguments,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<stdin>", line 4, in raise_exception
TypeError: forced TypeError
"""

# try to add an optional group to pick up the "underlining" (^^^) in x2,
# but still matches x1
expect_old = \
fr"""Traceback \(most recent call last\):
  File "<stdin>", line \d+, in (\?|<module>)
  File "[^"]+TestCommon.py", line \d+, in run
    super\(\).run\(\*\*kw\)
  File "[^"]+TestCmd.py", line \d+, in run
    p = self.start\(program=program,
(?:.*)
  File "[^"]+TestCommon.py", line \d+, in start
    raise e
  File "[^"]+TestCommon.py", line \d+, in start
    return super\(\).start\(program, interpreter, arguments,
(?:.*)  File "<stdin>", line \d+, in raise_exception
TypeError: forced TypeError
"""

expect = \
fr"""Traceback \(most recent call last\):
  File \"<stdin>\", line \d+, in (\?|<module>)
  File \"[^\"]+TestCommon.py\", line \d+, in run
    super\(\).run\(\*\*kw\)
  File \"[^\"]+TestCmd.py\", line \d+, in run
    p = self.start\(program=program,
(?:\s*\^*\s)?  File \"[^\"]+TestCommon.py\", line \d+, in start
    raise e
  File \"[^\"]+TestCommon.py\", line \d+, in start
    return super\(\).start\(program, interpreter, arguments,
(?:\s*\^*\s)?  File \"<stdin>\", line \d+, in raise_exception
TypeError: forced TypeError"""

rv1 = re.match(expect, x1)
if rv1:
    print("pattern 1 matches")
else:
    print("pattern 1 does not match")
rv2 = re.match(expect, x2)
if rv2:
    print("pattern 2 matches")
else:
    print("pattern 2 does not match")

that was tricky.. got it..
https://gist.github.com/bdbaddog/ef6d5fdd1d6b2ede49d9bea86b6ac045