from waterbutler.core import metadata

class BaseOsfStorageMetadata:
    @property
    def provider(self):
        return 'osfstorage'


class OsfStorageFileMetadata(BaseOsfStorageMetadata, metadata.BaseFileMetadata):

    @property
    def name(self):
        return self.raw['name']

    @property
    def path(self):
        if self.raw['path'][0] != '/':
            return '/' + self.raw['path']
        return self.raw['path']

    @property
    def modified(self):
        return self.raw.get('modified')

    @property
    def size(self):
        return self.raw.get('size')

    @property
    def content_type(self):
        return None

    @property
    def extra(self):
        return {
            'downloads': self.raw['downloads']
        }


class OsfStorageFolderMetadata(BaseOsfStorageMetadata, metadata.BaseFolderMetadata):

    @property
    def name(self):
        return self.raw['name']

    @property
    def path(self):
        return self.raw['path']

from waterbutler.core import metadata

class BaseOsfStorageMetadata:
    @property
    def provider(self):
        return 'osfstorage'


class OsfStorageFileMetadata(BaseOsfStorageMetadata, metadata.BaseFileMetadata):

    @property
    def name(self):
        return self.raw['name']

    @property
    def path(self):
        if self.raw['path'][0].startswith('/'):
            return self.raw['path']
        return '/' + self.raw['path']

    @property
    def modified(self):
        return self.raw.get('modified')

    @property
    def size(self):
        return self.raw.get('size')

    @property
    def content_type(self):
        return None

    @property
    def extra(self):
        return {
            'downloads': self.raw['downloads']
        }


class OsfStorageFolderMetadata(BaseOsfStorageMetadata, metadata.BaseFolderMetadata):

    @property
    def name(self):
        return self.raw['name']

    @property
    def path(self):
        return self.raw['path']

Use startswith in favor of indexing
Use startswith in favor of indexing
