python - need string or buffer, file found -

i should keep offset file , read offset line , emit, update offset = offset + 1

class simspout(storm.spout):    # not here such basic spout   def initialize(self, conf, context):     ## open file read permit     self.f = open('data.txt', 'r')     ## read first line     self._conf = conf     self._context = context     self._offset = 0     storm.loginfo("spout instance starting...")   # process next tuple  def nexttuple(self):     # check if reach @ eof close     open(self.f) f:       f.readlines()[self._offset]       #emit random sentence       storm.loginfo("emiting %s" % line)       storm.emit([line])     self._offset = self._offset + 1 

but got error

with open(self.f) f: typeerror: coercing unicode: need string or buffer, file found 

you opening file in line

self.f = open('data.txt', 'r') 

and trying open file handle instead of same file in line

with open(self.f) f: 

instead, in nexttuple, use self.f instead of f