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Consider replacing regex for matching * with fnmatch

3

[Fnmatch](https://docs.python.org/3/library/fnmatch.html) is a python standard library tool which provides unix style wildcard pattern matching. Not as powerful as regex of course but for just matching with `*` it should be...

phackstock

write multiple sheets with to_excel when df exceeds excel limit

2

Excel row limit is 1,048,576 gives error `ValueError: This sheet is too large! Your sheet size is: i, j Max sheet size is: 1048576, 16384` Are there any good strategies...

byersiiasa

`filter()` fails when using non-ascii characters like `\xa0`

5

The recent fast-pass-improving for filtering (see #505) breaks when encountering non-ascii characters (in the case where we ran into it, a Unicode `\xa0` non-breaking space).

danielhuppmann

The following ValueError occurs when using a single (1) subregion for a region in the downscale_region() function. Downscaling in this situation is not required, however for convenience it would be...

maartenbrinkerink

Per this comment by @coroa in https://github.com/IAMconsortium/pyam/pull/510/#pullrequestreview-617773851 > The next low-hanging fruit on the speed-up quest is to add a (non-copying!?) fast-path to `__init__` for a `pd.Series` in *perfect* condition,...

danielhuppmann

When reading a data file, pandas tries to identify the most suitable type for each column. This can result in having types other than string in the index columns, which...

danielhuppmann

Currently lineplot has option `fill_between=True` which shades the min-max ranges between a model, or other argument that is passed to `color`, e.g. scenario or a column in the meta (iirc)....

byersiiasa

Aggregate variables with different units

1

If I have an IamDataFrame df with two variables, 'Primary Energy|Gas' with unit 'TWh/yr' and 'Emission Factor|Gas' with unit 'Mt/TWh'. If I want to aggregate both variables to 'Emissions|Gas' doing...

pjuergens

Add `arg_column` argument to `set_meta_from_data`

1

The function [set_meta_from_data()](https://pyam-iamc.readthedocs.io/en/stable/api/iamdataframe.html#pyam.IamDataFrame.set_meta_from_data) allows to specify a `column` on which to apply a given method. This is helpful to get the maximum of a timeseries (e.g., peak temperature during the...

danielhuppmann

Background color in matplotlib - white vs. transparent

2

Glen Peters pointed out in [this tweet](https://twitter.com/Peters_Glen/status/1305764818633269248) that copy-pasting pyam/matplotlib figures into social media leads to suboptimal results. Any thoughts on whether to set the background color to white for...

danielhuppmann