138 def write_bytewise(f, source):  argument
145 def write_small_chunks(f, source):  argument
152 def write_medium_chunks(f, source):  argument
159 def write_large_chunks(f, source):  argument
167 def modify_bytewise(f, source):  argument
175 def modify_small_chunks(f, source):  argument
183 def modify_medium_chunks(f, source):  argument
191 def modify_seek_forward_bytewise(f, source):  argument
200 def modify_seek_forward_blockwise(f, source):  argument
210 def read_modify_bytewise(f, source):  argument
219 def read_modify_blockwise(f, source):  argument