Version 0.12.0

In this release we had a little focus on:

0. Primitives and constants and how to use them
1. Strings and numbers and how to write them
2. OOP features
3. Blocks and code structure,
   including variable scoping and overlaping variables
4. Overused expressions and new complexity metrics

Features

• Breaking: moves ImplicitInConditionViolation from WPS336 to WPS514
• Breaking: now ExplicitStringConcatViolation uses WPS336
• Breaking: moves YieldMagicMethodViolation from WPS435 to WPS611
• Adds xenon as a dependency, it also checks for cyclomatic complexity,
  but uses more advanced algorithm with better results
• Forbids to have modules with too many imported names
  configured by --max-imported-names option which is 50 by default
• Forbids to raise StopIteration inside generators
• Forbids to have incorrect method order inside classes
• Forbids to make some magic methods async
• Forbids to use meaningless zeros in float, binary, octal, hex,
  and expanentional numbers
• Enforces to use 1e10 instead of 1e+10
• Enforces to use big letters for hex numbers: 0xAB instead of 0xab
• Enforces to use r'\n' instead of '\\n'
• Forbids to have unicode escape characters inside binary strings
• Forbids to use else if instead of elif
• Forbids to have too long try bodies,
  basically try bodies with more than one statement
• Forbids to overlap local and block variables
• Forbids to use block variables after the block definitions
• Changes how WrongSlotsViolation works, now (...) + value is restricted
  in favor of (..., *value)
• Forbids to have explicit unhashable types in sets and dicts
• Forbids to define useless overwritten methods
• Enforces j prefix over J for complex numbers
• Forbids overused expressions
• Forbids explicit 0 division, multiply, pow, addition, and substraction
• Fordids to pow, multiply, or divide by 1
• Forbids to use expressions like x + -2, or y - -1, or z -= -1
• Forbids to multiply lists like [0] * 2
• Forbids to use variable names like __ and _____
• Forbids to define unused variables explicitly: _unused = 2
• Forbids to shadow outer scope variables with local ones
• Forbids to have too many assert statements in a function
• Forbids to have explicit string contact: 'a' + some_data, use .format()
• Now YieldInsideInitViolation is named YieldMagicMethodViolation
  and it also checks different magic methods in a class
• Forbids to use assert False and other false-constants
• Forbids to use while False: and other false-constants
• Forbids to use open() outside of with
• Forbids to use type() for compares
• Forbids to have consecutive expressions with too deep access level
• Forbids to have too many public instance attributes
• Forbids to use pointless star operations: print(*[])
• Forbids to use range(len(some)), use enumerate(some) instead
• Forbids to use implicit sum() calls and replace them with loops
• Forbids to compare with the falsy constants like if some == []:

Bugfixes

• Bumps flake8-eradicate version
  and solves attrs incompatible versions issue
• Bumps flake8-dosctrings veresion
  and solved pydocstyle issue
• Fixes TryExceptMultipleReturnPathViolation not tracking else and finally
  returns at the same time
• Fixes how TryExceptMultipleReturnPathViolation works:
  now handles break and raise statements as well
• Fixes WrongLoopIterTypeViolation not triggering
  for generator expressions and empty tuples
• Fixes WrongLoopIterTypeViolation not triggering
  for numbers (including negative), booleans, None
• Fixes WrongLoopIterTypeViolation position
• Fixes WrongLoopIterTypeViolation not triggering for compehensions
• Fixes WrongSlotsViolation not triggering
  for comprehensions and incorrect __slots__ names and types
• Fixes WrongSlotsViolation not triggering
  for invalid python identifiers like __slots__ = ('123_slot',)
• Fixes WrongSlotsViolation triggering for subscripts
• Fixes NestedClassViolation and NestedFunctionViolation not reporting
  when placed deeply inside other nodes
• Fixes when WrongUnpackingViolation was not raised
  for async for and async with nodes
• Fixes when WrongUnpackingViolation was not raised for comprehensions
• Fixes that x, y, z = x, z, y was not recognized
  as ReassigningVariableToItselfViolation
• Fixes that {1, True, 1.0} was not recognised as a set with duplicates
• Fixes that {(1, 2), (1, 2)} was not recognised as a set with duplicates
• Fixes that {*(1, 2), *(1, 2)} was not recognised as a set with duplicates
• Fixes that {1: 1, True: 1} was not recognised as a dict with duplicates
• Fixes that complex numbers were always treated like magic,
  now 1j is allowed
• Fixes that 0.0 was treated as a magic number
• Fixes that it was possible to use _ in module body
• Fixes WrongBaseClassViolation not triggering
  for nested nodes like class Test(call().length):
• Fixes ComplexDefaultValueViolation not triggering
  for nested nodes like def func(arg=call().attr)
• Fixes TooShortNameViolation was not triggering for _x and x_
• Fixes that some magic method were allowed to be generators
• Fixes that some magic method were allowed to contain yield from
• Fixes bug when some correct noqa: comments were reported as incorrect
• Fixes bug when some else: return were not reported as incorrect
• Fixes bug when WPS507 sometimes were raising ValueError
• Fixes bug when return None was not recognized as inconsistent

Misc

• Adds styles/ directory with style presets for tools we use and recommend
• Adds bellybutton to the list of other linters
• Documents how to use nitpick to sync the configuration
• Documents how to use flakehell to create baselines for legacy integrations
• Improves tests for binary, octal, hex, and expanetional numbers
• Adds new xenon CI check
• Now handles exceptions in our own code, hope to never see them!
• Now uses coverage checks in deepsource
• Now @alias checks that all aliases are valid
• Changes how presets are defined
• Improves how DirectMagicAttributeAccessViolation is tested
• Refactors a lot of tests to tests ast.Starred
• Refactors a lot of tests to have less tests with the same logical coverage
• We now use import-linter instead of layer-linter
• Adds docs about CI integration
• Now wheels are not universal
• Updates docs about snake_case in Enum fields
• Updates docs about WPS400 and incorrect line number