def touchz(self, dest):
        key = self.get_s3_key(dest)
        if key and key.size != 0:
            raise OSError('Non-empty file %r already exists!' % (dest,))

        self.make_s3_key(dest).set_contents_from_string('')

    # Utilities for interacting with S3 using S3 URIs.

    # Try to use the more general filesystem interface unless you really
    # need to do something S3-specific (e.g. setting file permissions)
Make an empty file in the given location. Raises an error if
dataset/ETHPy150Open Yelp/mrjob/mrjob/fs/s3.py/S3Filesystem.touchz