Question

Possible Duplicate:
builtins.TypeError: must be str, not bytes

I wrote a program to write a dict to file and in Python 2.7 it works well, but now in Python 3 I receive TypeError: 'str' does not support the buffer interface and TypeError: must be str, not bytes

CODE UPDATED

Inputs: path to dir, file name (!hamers.txt for example) and new dictionary

Outputs: none

Effects: Generate new file with dictionary. Check if file exists and then merge two dictionaries (existing and new).

def generate_file_from_dict(self, path, fname, my_new_dict):                   
                    mfile = self.add_slash(path)+fname
            if os.path.exists(mfile):
                    mfile = open(mfile, 'rb')
                    my_existing_dict = pickle.load(mfile)
                    my_new_dict = dict(my_existing_dict.items() + my_new_dict.items())
                    mfile.close()
            mfile = open(self.add_slash(path)+fname, 'wb+')
            pickle.dump(my_new_dict, mfile)
            mfile.close()

Now its

my_existing_dict = pickle.load(mfile)
EOFError

Answer 1

The file should opened in binary

mfile = open(mfile,'rb')

mfile = open(self.add_slash(path)+fname, 'wb+')