## Summary Chainer assumes GFP channel exists, breaking grouper ## Steps to reproduce Use `aliby` d89c2cd5112ceb55ece64fddc614f5ce70d9fe3c or 0.1.49 (b206c48a180a9a04eeebbe7f06ea0fa8fefaa4af). Minimal working example -- use `grouper` like so: ``` from postprocessor.grouper import NameGrouper # Define system path to HDF5 file data_dir = ..... # Define path in HDF5 file to signal, # e.g. 'extraction/mCherry_bgsub/max/mean' h5path = ..... grouper = NameGrouper(data_dir) s = grouper.concat_signal(h5path) ``` ## What is the current bug behavior? `IndexError` raised, see traceback below. ## What is the expected correct behavior? `s` should be defined as an object that contains the appropriate signal from the `grouper` object. ## Logs/Traceback ``` Traceback (most recent call last): File "strain_report_dev.py", line 53, in <module> grouper = NameGrouper(data_directory) File "/home/arin/git/aliby/src/postprocessor/grouper.py", line 302, in __init__ super().__init__(dir=dir) File "/home/arin/git/aliby/src/postprocessor/grouper.py", line 31, in __init__ self.load_chains() File "/home/arin/git/aliby/src/postprocessor/grouper.py", line 35, in load_chains self.chainers = {f.name[:-3]: Chainer(f) for f in self.files} File "/home/arin/git/aliby/src/postprocessor/grouper.py", line 35, in <dictcomp> self.chainers = {f.name[:-3]: Chainer(f) for f in self.files} File "/home/arin/git/aliby/src/postprocessor/chainer.py", line 28, in __init__ channel = [ch for ch in self.channels if re.match("GFP", ch)][0] IndexError: list index out of range ``` see https://git.ecdf.ed.ac.uk/swain-lab/aliby/aliby/-/commit/78f9499c37ee7ca729cf5c7fd8e631ea649ffc9c#note_106921 ## Possible fixes This was actually fixed in c361e0045c08b2ab0f3fafbf56cf405c7f7a1da3 and 252915c649dddc91dae3a36b8428f3940baf094c to create `aliby` 0.1.48, but apparently broke something else (see https://git.ecdf.ed.ac.uk/swain-lab/aliby/aliby/-/commit/78f9499c37ee7ca729cf5c7fd8e631ea649ffc9c#note_106980), so those changes were removed in `aliby` 0.1.49