human
I am working on the file "CapstoneSEER/SEER Data Analysis Phase 1- Ingestion.ipynb".
The first task is:
The load_one_file function performs the sql inserts in the database. The fname parameter is the name of the individual SEER dataflie to import. The function then returns the number of rows inserted. The function also assigns column names.
Can you write Python code for it?

What is a the Python code you requested?
assistant
#Here is the Python code you requested.

    def load_one_file(self, fname):
        
        if self.verbose:
            print('\nStart Loading Data: {0}'.format(fname))

        # Need to get the name of the SEER text file so we can store it into
        # the SOURCE field.
        fileSource = os.path.basename(fname)
        fileSource = os.path.splitext(fileSource)[0]

        try:
            self.db_conn.execute('DROP TABLE {0}'.format(fileSource))
        except:
            pass

        colInfo = []  # hold start, stop byte offset for each field, used by read_fwf
        for off, len in zip(self.dfDataDict.OFFSET, self.dfDataDict.LENGTH):
            colInfo.append((off-1, off-1+len))

        if self.verbose:
            print('Starting read of raw data.')

        dfData = pd.read_fwf(fname, colspecs = colInfo, header=None) #, nrows=100000) 
        #, nrows = self.batchSize, skiprows=totRows)

        # assign column names
        dfData.columns = self.dfDataDict.FIELD_NAME

        if self.verbose:
            print('Starting load of data to database.')

        sql.to_sql(dfData, name=fileSource, con=self.db_conn, index=False, if_exists='append', 
                   chunksize=self.batchSize)

        if self.verbose:
            print('\n - Loading completed. Rows Imported: {0:d}'.format(dfData.shape[0]))

        return dfData.shape[0] # number of rows