Economic calendar command

[montezdesousa]

Description

This PR adds an economic calendar to the economy menu. The command (ecocal) output is a rich table with information regarding world economic events. The database can be sliced by date, event category, event importance, country and set a GMT time zone. User can get actual, forecast and previous data point for each event (when applicable). Historic data is available as well.

Still have to write tests but would be nice to get some feedback first, particularly on usage and defaults. I believe this data might be useful later on automated reports for e.g. It is quite relevant for any investor or economic researcher that tracks on advanced indicators and arguably accounts for a relevant part of daily market movements.

Examples (after changes):

• Lisbon time
  

• New York time
  

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[minhhoang1023]

For the default timezone, we could fetch users' timezone in the settings and populate it dynamically.

[montezdesousa]

yes, that makes sense

[minhhoang1023]

Very nice feature! 🚀 Calendar events can give some useful signals on how the economy is doing.

• When I filtered for events with a high level of importance, an event without any determined level of importance (aka None) still show up. It should instead be hidden.

• Would be nice to add a link to the event. The natural tendency is to read more about certain events to understand their implications. Right now users would need to copy-paste the event name and Google search. Some event names are rather generic, so searches can be incorrect. e.g. Factory Orders (MoM) (May)

• A minor thing - there is a lot of None in the table. It'd be cleaner to display it as empty strings - gonna be easier to scan for information. Similar to the investing.com source

[minhhoang1023]

you can add the param choices to restrict only certain values, and to show in documents the available options. Like the interval one below. You already added auto-completion for this purpose, but argparse wouldn't allow for autocompletion if it's not the first argument. Pain in the neck.

[minhhoang1023]

we should set a limit on # of events. now i had to scroll a lot get to the top...

[montezdesousa]

we should set a limit on # of events. now i had to scroll a lot get to the top...

Did you pull the last version? 'None' should not be there and title should be "Calendar (GMT+...)" like the screenshots I replaced in the PR. Anyway you mean a limiting argument similar to other commands?

[minhhoang1023]

@montezdesousa yes that's what I mean. And we can set a default limit of 10. As my default is US, the return list of events is very long, spanning over several pages.