find . -iname '*.py' | grep -Ev 'rdf4|tool' | xargs -P4 -I{} python3.8 -Wall -m py_compile {}
./callee/collections.py:98: DeprecationWarning: invalid escape sequence \ 
  """Matches an iterable that's a generator.
./callee/types.py:19: DeprecationWarning: invalid escape sequence \ 
  """:param type\ _: Type to match against"""
./callee/types.py:35: DeprecationWarning: invalid escape sequence \ 
  """
./callee/types.py:61: DeprecationWarning: invalid escape sequence \ 
  """
./callee/operators.py:188: DeprecationWarning: invalid escape sequence \ 
  """Matches values that are shorter than,
./callee/operators.py:206: DeprecationWarning: invalid escape sequence \ 
  """Matches values that are longer than,
./callee/numbers.py:46: DeprecationWarning: invalid escape sequence \ 
  """Matches any complex number.
./callee/numbers.py:60: DeprecationWarning: invalid escape sequence \ 
  """Matches any real number.
./callee/numbers.py:75: DeprecationWarning: invalid escape sequence \ 
  """Matches a rational number.
./callee/base.py:150: DeprecationWarning: invalid escape sequence \ 
  """Provides a default ``repr``\ esentation for custom matchers.