Methods that need to be removed on the next PR for this issue:

1. picklable_lamda_alpha
2. picklable_lamda_sigma
3. get_pnames2pindex

See #277 (comment).

This was originally a comment in GH-277 in relation to the second insufficient dates ValueError in the constructor of the Parameters class. I'm not sure how to get to the second pathway to this error message.

1. We subset the read in dataframe to ti to tf so if the dataframe goes from 2024-01-01 through 2024-01-05 and the given date range is 2024-01-02 through 2024-01-06 the dataframe's date range will be subsetted to 2024-01-02 through 2024-01-05 which is a repeat of the above.
2. Because of the subsetting you can't provide anything except a monotonic increasing sequence of dates, pandas only allows subsetting on ordered date indexes so you'll get a different error.
3. If you provide a monotonic increasing sequence of dates but 'reverse' ti and tf you get no errors (which I think is also bad) because the slice operation returns an empty dataframe with the right columns & index and the pd.date_range function only creates monotonic increasing sequences and 0 == 0.

If this is dead code then I think we should just remove it, but @saraloo and @jcblemai do y'all have any thoughts?

See: #277 (comment).

An open TODO for this issue that needs to be followed up on is adding descriptions to the examples of the new testing functions added per this comment: #277 (comment). Took care of the immediate one there, but will address others in a follow up.

@TimothyWillard Are you systematically going through all gempyor modules to do documentation, testing, and repairs?

@emprzy Yes, piece by piece. Some of the open ones can be found here: https://github.com/HopkinsIDD/flepiMoP/issues?q=is%3Aissue+is%3Aopen+document+test+. Although, I don't think that covers all of the outstanding work.

@emprzy Yes, piece by piece. Some of the open ones can be found here: https://github.com/HopkinsIDD/flepiMoP/issues?q=is%3Aissue+is%3Aopen+document+test+. Although, I don't think that covers all of the outstanding work.

Let me know if you want any extra hands on this, or if you have specific tasks you'd like to delegate to me! Always happy to (try to) help.