Multiple rows and columns introduce false index items

[Ivan Ruiz Manuel]

What happened?

Loading a file with multiple rows and multiple columns adds fake indexes sometimes.

See the file:

vintagesteps,2020,2030,2040,2050,2030,2040,2050,2040,2050,2050
investsteps,2020,2020,2020,2020,2030,2030,2030,2040,2040,2050
techs,,,,,,,,,,
geothermal,1,1,1,1,1,1,1,1,1,1
hydropower,1,1,1,1,1,1,1,1,1,1
waste,1,1,0.0,0,1,1,0.0,1,1,1
bioenergy,1,1,0.8,0,1,1,0.8,1,1,1
oil,1,1,1,1,1,1,1,1,1,1
coal,1,1,1,1,1,1,1,1,1,1
ccgt,1,1,0.0,0,1,1,0.0,1,1,1
wind,1,1,0.0,0,1,1,0.0,1,1,1
pv,1,1,1,0.2,1,1,1,1,1,1
battery_li,1,1,0.5,0,1,1,0.5,1,1,1
battery_phs,1,1,1,1,1,1,1,1,1,1

Loaded via:

  vintage_availability_techs:
    source: data_sources/investstep_series/available_vintages_techs.csv
    rows: techs
    columns: [vintagesteps, investsteps]
    add_dimensions:
      parameters: available_vintages

In this case, a fake index called techs will be added.

Which operating systems have you used?

• macOS
• Windows
• Linux

Version

v0.7

Relevant log output

No response

[Ivan Ruiz Manuel]

Another example:

This one fails. Removing the header fixes the issue. Interestingly, the behavior changes depending on whether or not you are using a debugger.

nodes,techs,parameters,values
NORD,ccgt,initial_flow_cap,20000000
NORD,hydropower,initial_flow_cap,11191600
NORD,wind,initial_flow_cap,115600
NORD,pv,initial_flow_cap,8319100
NORD,battery_phs,initial_flow_cap,5064300
NORD,battery_phs,initial_storage_cap,469050200
NORD,waste,initial_flow_cap,384700
NORD,bioenergy,initial_flow_cap,2159900
CNOR,ccgt,initial_flow_cap,2000000
CNOR,hydropower,initial_flow_cap,1100900
CNOR,wind,initial_flow_cap,133600
CNOR,pv,initial_flow_cap,2270800
CNOR,waste,initial_flow_cap,23000

data_sources:
  # Initial setup
  initial_tech_capacity_params:
    source: data_sources/initial_capacity_techs_kw.csv
    rows: [nodes, techs, parameters]

[Bryn Pickering]

OK, so this is a limitation of what we can ask of pandas.

A workaround:

data_sources:
  # Initial setup
  initial_tech_capacity_params:
    source: data_sources/initial_capacity_techs_kw.csv
    rows: [nodes, techs, parameters]
    columns: [values]
    drop: values

[Bryn Pickering]

I can only reproduce this issue with your second example. The first one loads just fine.

[Ivan Ruiz Manuel]

I can only reproduce this issue with your second example. The first one loads just fine.

Odd, that's the one I saw as most problematic. I'll give an update if I can reproduce it...

For the second: I would like to propose that this type of "dropping" should be the standard, to ensure the files given to the model are "stand alone". Otherwise, you'd need to always consult two files. This way, you have good data practices "baked in".

What do you think?

[Bryn Pickering]

It's impossible to make it standard as we have to know whether the top row is data or not. As soon as you say it isn't data (columns: [...]) then it becomes an index / column and you wouldn't want that data deleted automatically if you actually _wanted_ it to be part of you model. So the only way to handle it consistently is to force the user to be explicit or to tell them that there must _always_ be a header and that if they miss it then their top row of data may be silently(?) lost...

…

On Wed, 21 Feb 2024, 19:35 Ivan Ruiz Manuel, ***@***.***> wrote: I can only reproduce this issue with your second example. The first one loads just fine. Odd, that's the one I saw as most problematic. I'll give an update if I can reproduce it... For the second: I would like to propose that this type of "dropping" should be the standard, to ensure the files given to the model are "stand alone". Otherwise, you'd need to always consult two files. This way, you have good data practices "baked in". What do you think? — Reply to this email directly, view it on GitHub <#573 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEDB63XQKJEQUYE5ON7NDI3YUZEBNAVCNFSM6AAAAABDTMI46KVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNJXG43DKNBTGA> . You are receiving this because you commented.Message ID: ***@***.***>

[Ivan Ruiz Manuel]

Hmmm, that is true...
The only way to make it possible would be to force one type of table (i.e. rows only), which would make the input very inflexible).

[Bryn Pickering]

Plan: enforce a header to always exist in a CSV, even if it is just one row. We will set header=0 as the bare minimum internally.