Backwards compatibility with Version 1.3.1post1

[tonggehua]

Describe the bug Version 1.4.0 (commit 5ef964c5bb0515260aac9acc760ee385f7c38fa1) cannot read seq files generated with Version 1.3.1post1

To Reproduce

1. Pull from referenced commit
2. Run the following in Python console:

   from pypulseq.Sequence.sequence import Sequence
   seq =  Sequence()
   seq.read('ute2d.seq')

   (This leads to Error 1)

3. Change the version number in the seq file from 1.3.1post1 to 1.3.1 and rerun the same thing (This leads to Error 2)

Error 1: Traceback (most recent call last): File "C:\Users\tongg\PycharmProjects\disimpy\venv\lib\site-packages\IPython\core\interactiveshell.py", line 3319, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File "", line 1, in seq.read('ute2d.seq') File "C:\Users\tongg\PycharmProjects\pypulseq\pypulseq\Sequence\sequence.py", line 943, in read read(self, path=file_path, detect_rf_use=detect_rf_use) File "C:\Users\tongg\PycharmProjects\pypulseq\pypulseq\Sequence\read_seq.py", line 98, in read version_major, version_minor, version_revision = __read_version(input_file) File "C:\Users\tongg\PycharmProjects\pypulseq\pypulseq\Sequence\read_seq.py", line 412, in __read_version revision = int(tok[1]) ValueError: invalid literal for int() with base 10: '1post1'

Error 2: Traceback (most recent call last): File "C:\Users\tongg\PycharmProjects\disimpy\venv\lib\site-packages\IPython\core\interactiveshell.py", line 3319, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File "", line 1, in seq.read('ute2d.seq') File "C:\Users\tongg\PycharmProjects\pypulseq\pypulseq\Sequence\sequence.py", line 943, in read read(self, path=file_path, detect_rf_use=detect_rf_use) File "C:\Users\tongg\PycharmProjects\pypulseq\pypulseq\Sequence\read_seq.py", line 225, in read self.rf_library.data[i][:3], KeyError: 0

Expected behavior The sequence should be loaded without generating either error.

Desktop (please complete the following information):

• OS: Windows 10
  • pypulseq version: 1.4.0 (5ef964c5bb0515260aac9acc760ee385f7c38fa1)

Seq file used ute2d.seq (Attached; change extension to .seq before using) ute2d.md

[schuenke]

I am struggling with the same problem. Are you working on a solution yet or should I try finding a solution and create a PR? Don't wanna spend time on it if you are almost done anyway.

[sravan953]

@schuenke I have not yet started working on it - but I will get it done soon. Thanks for offering to help!

[sravan953]

@tonggehua @schuenke Thanks for bearing with me, commit 7f8345cba4ca6d686e65457b78900729d131a6ea should hopefully fix this.

@tonggehua P.S: For quite some time now, you can just do import pypulseq as pp and call submodules/methods directly:

import pypulseq as pp

seq = pp.Sequence()

[schuenke]

@sravan953 it seems to work for me. Thanks 👍