old_contents: from setuptools import setup
  
  setup(
      name='py_expression_eval',
      version='0.3',
      description='Python Mathematical Expression Evaluator',
      url='https://github.com/AxiaCore/py-expression-eval/',
      author='vero4ka',
      author_email='ctrl-alt-delete@live.ru',
      license='MIT',
      packages=['py_expression_eval'],
      zip_safe=False,
  )
  
new_contents: from setuptools import setup
  
  setup(
      name='py_expression_eval',
      version='0.3.1',
      description='Python Mathematical Expression Evaluator',
      url='https://github.com/AxiaCore/py-expression-eval/',
      author='vero4ka',
      author_email='ctrl-alt-delete@live.ru',
      license='MIT',
      packages=['py_expression_eval'],
      zip_safe=False,
  )
  
subject: Upgrade version to v0.3.1