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CSV

CSV is a common data exchange format that stores tabular data in a plain text file. A CSV file stores the data in a delimited text file that uses commas to separate the values.

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sheetjs
DamirKh
DamirKh commented Nov 14, 2019

It would be great to have the option "skip N lines", since CSV files often contain not commented headers. Can this be implemented?
For example:

This is a data file generated by some old software.
Next line will contain a headers of parameters.
Temperature, Humidity, Voltage
22.5, 45.5, 220
23.0, 44.0, 219
...
In such case "skipLines: 2" could be added to con

datasette
labstersteve
labstersteve commented Jan 18, 2020

While it's sometimes valuable to know how a project has developed, there is usually little justification for including this information in the README, and certainly not immediately after other key information such as "what does this package do, and who might want to use it?"

Might I recommend that the feature history is migrated to an Appendix in the documentation?

trantor
trantor commented Jan 23, 2020

Hello.
I've come across what (to me) seems to be a problem with the FILENAME and FILENUM variables.

# mlr --version
Miller v5.6.2

# cat /tmp/csv1
A,B,C
_2GB,255,2
_4GB,120,4
_6GB,50,6
_10GB,10,10

# cat /tmp/csv2
FIRST,SECOND,THIRD,FOURTH
1,2,3,4
5,6,7,8
9,10,11,12
13,14,15,16

# mlr --icsv cat then put 'print FILENAME'   /tmp/csv1 /tmp/csv2
/tmp/csv1
A=_2GB,B=255,C=2
/
mbloch
mbloch commented Jan 14, 2019

Lack of documentation is a problem for most users. I have a few ideas for how to improve the documentation.

  • There should be more examples.
  • Examples should all be runnable, and sample input data should be downloadable.
  • The documentation should include articles on important topics, for example, coordinate systems, simplification methods, and how to use JavaScript expressions as arguments
spamandeggs
spamandeggs commented Mar 18, 2020

IMPORT_EXPORT_USE_TRANSACTIONS default is True and not False as documented in latest
https://django-import-export.readthedocs.io/en/stable/installation.html

IMPORT_EXPORT_USE_TRANSACTIONS = False in settings is mandatory if one want to actually import something in a mysql db (at least)

without it :

result = somemodel_resource.import_data(datanew, dry_run=True)

will fail with "Impr

Jemi
Jemi commented Feb 18, 2020

I'm using tsv-utils from the arch linux aur, trying to format some word frequency data from the new general services list dataset. tsv-utils makes at least two errors that I'm able to see when I'm running this commandline:

tsv-select -f 1,7 NGSL+1.01+with+SFI.tsv | tsv-pretty | less

adding -s 5 to tsv-pretty works around this problem. The tsv file was converted from the file NGSL+1.01+with

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