Code refactoring and typing

[tchar]

Move calculate_anything/calculation/calculation.py -> calculate_anything/calculation/calculator.py Move calculate_anything/query/multi_handler.py -> calculate_anything/query/handlers/multi_handler.py Move calculate_anything/test/calculation/test_calculation.py -> calculate_anything/test/calculation/test_calculator.py

Add calculate_anything/time/data.py with typing for Cities

Rename calculate_anything.calculation.base._Calculation to Calculation Rename calculate_anything.calculation.calculation.Calculation to CalculatorCalculation

Introduce calculate_anything.calculation.base.CalculationError

• Handles errors
• Remove all error=None from every valid calculation and return a CalculationError object in case of errors
• Refactor all handlers to add items with type of CalculationError where appropriate

Add typing to every method, function, property

[codecov[bot]]

Codecov Report

Merging #22 (76ecb97) into master (286c742) will decrease coverage by 0.13561%. The diff coverage is 97.04918%.

@@                 Coverage Diff                 @@
##              master         #22         +/-   ##
===================================================
- Coverage   95.26565%   95.13004%   -0.13561%     
===================================================
  Files             55          56          +1     
  Lines           3802        3922        +120     
===================================================
+ Hits            3622        3731        +109     
- Misses           180         191         +11     

Flag	Coverage Δ
unittests	95.13004% <97.04918%> (-0.13561%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
calculate_anything/lang.py	100.00000% <ø> (ø)
calculate_anything/regex.py	100.00000% <ø> (ø)
calculate_anything/currency/cache.py	67.39130% <74.19355%> (-0.84400%)	:arrow_down:
...ything/currency/providers/european_central_bank.py	95.23810% <90.47619%> (-2.02218%)	:arrow_down:
calculate_anything/calculation/units.py	70.52023% <91.30435%> (-0.48570%)	:arrow_down:
calculate_anything/time/service.py	87.30159% <92.30769%> (-0.62945%)	:arrow_down:
calculate_anything/query/handlers/base_n.py	89.54248% <95.00000%> (+0.65358%)	:arrow_up:
calculate_anything/currency/providers/base.py	97.05882% <95.23810%> (-1.21704%)	:arrow_down:
calculate_anything/utils/loaders/json.py	99.24242% <95.65217%> (-0.75759%)	:arrow_down:
calculate_anything/calculation/base.py	98.41270% <97.56098%> (-1.58730%)	:arrow_down:
... and 36 more

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