How to use the pbr.packaging.get_version function in pbr

record associated with the package, and if there is no such record
        falls back to the logic sdist would use.
        """
        # Lazy import because pkg_resources is costly to import so defer until
        # we absolutely need it.
        import pkg_resources
        try:
            requirement = pkg_resources.Requirement.parse(self.package)
            provider = pkg_resources.get_provider(requirement)
            result_string = provider.version
        except pkg_resources.DistributionNotFound:
            # The most likely cause for this is running tests in a tree
            # produced from a tarball where the package itself has not been
            # installed into anything. Revert to setup-time logic.
            from pbr import packaging
            result_string = packaging.get_version(self.package)
        return SemanticVersion.from_pip_string(result_string)

def my_get_script_args(*args, **kwargs):
        return _main_module()._orig_get_script_args(*args, **kwargs)

    packaging.override_get_script_args = my_get_script_args
    easy_install.get_script_args = my_get_script_args

    # another hack to allow setup from tarball.
    orig_get_version = packaging.get_version

    def my_get_version(package_name, pre_version=None):
        if package_name == 'ryu':
            return str(version)
        return orig_get_version(package_name, pre_version)

    packaging.get_version = my_get_version

# pbr's setup_hook replaces easy_install.get_script_args with
    # their own version, override_get_script_args, prefering simpler
    # scripts which are not aware of multi-version.
    # prevent that by doing the opposite.  it's a horrible hack
    # but we are in patching wars already...
    from pbr import packaging

    def my_get_script_args(*args, **kwargs):
        return _main_module()._orig_get_script_args(*args, **kwargs)

    packaging.override_get_script_args = my_get_script_args
    easy_install.get_script_args = my_get_script_args

    # another hack to allow setup from tarball.
    orig_get_version = packaging.get_version

    def my_get_version(package_name, pre_version=None):
        if package_name == 'yabmp':
            return str(version)
        return orig_get_version(package_name, pre_version)

    packaging.get_version = my_get_version

record associated with the package, and if there is no such record
        falls back to the logic sdist would use.
        """
        # Lazy import because pkg_resources is costly to import so defer until
        # we absolutely need it.
        import pkg_resources
        try:
            requirement = pkg_resources.Requirement.parse(self.package)
            provider = pkg_resources.get_provider(requirement)
            result_string = provider.version
        except pkg_resources.DistributionNotFound:
            # The most likely cause for this is running tests in a tree
            # produced from a tarball where the package itself has not been
            # installed into anything. Revert to setup-time logic.
            from pbr import packaging
            result_string = packaging.get_version(self.package)
        return SemanticVersion.from_pip_string(result_string)