Make print(config) friendlier for copy-paste

[mfeurer]

Implements #66.

Configurations are now printed as

Configuration(values={
  'chp': '1',
  'const': 1,
  'nfhp': 0.0,
  'nihp': 0,
  'ohp': '1',
  'ufhp': 5.5,
  'uihp': 6,
})

opposed to

Configuration:
  chp, Value: '1'
  const, Constant: 1
  nfhp, Value: 0.0
  nihp, Value: 0
  ohp, Value: '1'
  ufhp, Value: 5.5
  uihp, Value: 6

.

This does not yet allow for copy-pasting the configuration as the argument configuration_space is not printed, but it is much closer. Yet another alternative would be

{
  'chp': '1',
  'const': 1,
  'nfhp': 0.0,
  'nihp': 0,
  'ohp': '1',
  'ufhp': 5.5,
  'uihp': 6,
}

which could be used as the values argument to Configuration.

If there are any other suggestions I would be happy to hear about them.

CC @eddiebergman @KEggensperger @dengdifan @renesass @mlindauer @RaghuSpaceRajan

[RaghuSpaceRajan]

Looks good, generally. How come you did not add the argument configuration_space? Because we do not know the variable name for the argument configuration_space?

[codecov]

Codecov Report

Merging #210 (be027cf) into master (f71508c) will increase coverage by 1.83%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #210      +/-   ##
==========================================
+ Coverage   66.33%   68.17%   +1.83%     
==========================================
  Files          17       17              
  Lines        1613     1681      +68     
==========================================
+ Hits         1070     1146      +76     
+ Misses        543      535       -8     

Impacted Files	Coverage Δ
ConfigSpace/read_and_write/pcs_new.py	92.11% <0.00%> (+4.11%)	⬆️

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[eddiebergman]

I'm okay with either the current implementation or the pure dict one. In general, as long as print(dict(config)) gives a pure dict output, then this implementation as you have it is fine with me.

[KEggensperger]

Yes, this is much better than before. I am fine with the current version, but I would prefer something that is actually valid code, i.e. a pure dict, over something that just looks like its valid but is then missing an argument.

[renesass]

I like the dictionary output.

[mlindauer]

my gut feeling is that most of the community is looking for dict-like input and output. Therefore, I would also prefer this way of printing.

[dengdifan]

I would prefer the current implementation. We need to be aware that the printed object is a configuration, not a dict.

[mfeurer]

Thanks everyone for your feedback. As we need to balance readability and pastability here I think the current proposal strikes a nice middle ground:

• It keeps the information that we have a Configuration
• by calling print(dict(config)) one gets the dictionary representation
• it can be extended to include the ConfigSpace argument to which we don't know the variable name at print time

I just also updated the docs and enabled doctests.