137 def write_bytewise(f, source):  argument
144 def write_small_chunks(f, source):  argument
151 def write_medium_chunks(f, source):  argument
158 def write_large_chunks(f, source):  argument
166 def modify_bytewise(f, source):  argument
174 def modify_small_chunks(f, source):  argument
182 def modify_medium_chunks(f, source):  argument
190 def modify_seek_forward_bytewise(f, source):  argument
199 def modify_seek_forward_blockwise(f, source):  argument
209 def read_modify_bytewise(f, source):  argument
218 def read_modify_blockwise(f, source):  argument