I wrote the following code by data transfer from Access to Firebird

def FirebirdDatetime(dt):
    return '\'%s.%s.%s\'' % (str(dt.day).rjust(2,'0'),
                                   str(dt.month).rjust(2,'0'),
                                   str(dt.year).rjust(4,'0'))

def SelectFromAccessTable(tablename):
    return 'select * from [' + tablename+']'

def InsertToFirebirdTable(tablename, row):
    values=''
    i=0
    for elem in row:
        i+=1
        #print type(elem)
    if type(elem) == int:
            temp = str(elem)
        elif (type(elem) == str) or (type(elem)==unicode):
            temp = '\'%s\'' % (elem,)
        elif type(elem) == datetime.datetime:
            temp =FirebirdDatetime(elem)
        elif type(elem) == decimal.Decimal:
            temp = str(elem)
        elif elem==None:
             temp='null'        
    if (i<len(row)):
                values+=temp+', '                 
        else:
                values+=temp
    return 'insert into '+tablename+' values ('+values+')'

def AccessToFirebird(accesstablename, firebirdtablename, accesscursor, firebirdcursor):
    SelectSql=SelectFromAccessTable(accesstablename)
    for row in accesscursor.execute(SelectSql):
        InsertSql=InsertToFirebirdTable(firebirdtablename, row)
        InsertSql=InsertSql
        print InsertSql
        firebirdcursor.execute(InsertSql)

In the main module there is an AccessToFirebird function call

conAcc = pyodbc.connect('DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=D:\ThirdTask\Northwind.accdb')
SqlAccess=conAcc.cursor();
conn.begin()
cur=conn.cursor()
sql.AccessToFirebird('Customers', 'CLIENTS', SqlAccess, cur)
conn.commit()
conn.begin()
cur=conn.cursor()
sql.AccessToFirebird('??????????', 'EMPLOYEES', SqlAccess, cur)
sql.AccessToFirebird('????', 'ROLES', SqlAccess, cur)
sql.AccessToFirebird('???? ???????????', 'EMPLOYEES_ROLES', SqlAccess, cur)
sql.AccessToFirebird('????????', 'DELIVERY', SqlAccess, cur)
sql.AccessToFirebird('??????????', 'SUPPLIERS', SqlAccess, cur)
sql.AccessToFirebird('????????? ?????? ???????', 'TAX_STATUS_OF_ORDERS', SqlAccess, cur)
sql.AccessToFirebird('????????? ???????? ? ??????', 'STATE_ORDER_DETAILS', SqlAccess, cur)
sql.AccessToFirebird('????????? ???????', 'CONDITION_OF_ORDERS', SqlAccess, cur)
sql.AccessToFirebird('??????', 'ORDERS', SqlAccess, cur)
sql.AccessToFirebird('?????', 'BILLS', SqlAccess, cur)
sql.AccessToFirebird('????????? ?????? ?? ????????????', 'STATUS_PURCHASE_ORDER', SqlAccess, cur)
sql.AccessToFirebird('?????? ?? ????????????', 'ORDERS_FOR_ACQUISITION', SqlAccess, cur)
sql.AccessToFirebird('???????? ? ?????? ?? ????????????', 'INFORMPURCHASEORDER', SqlAccess, cur)
sql.AccessToFirebird('??????', 'PRODUCTS', SqlAccess, cur)
conn.commit()
conAcc.commit()
conn.close()
conAcc.close()

But as a result, not all records have been inserted into the table Products (Table Goods - Northwind database), for example, does not work request

insert into PRODUCTS values ('4', 1, 'NWTB-1', '?????????? ???', null, 13.5000, 18.0000, 10, 40, '10 ??????? ?? 20 ?????????', '10 ??????? ?? 20 ?????????', 10, '???????', '')

In ibexpert to this request message issued

can't format message 13:587 -- message file C:\Windows\firebird.msg not found.
conversion error from string "10 ?????????±???? ???? 20 ???°???µ?‚????????".

Worked only requests

insert into PRODUCTS values ('1', 82, 'NWTC-82', '???????', null, 2.0000, 4.0000, 20, 100, null, null, null, '????', '')
insert into PRODUCTS values ('9', 83, 'NWTCS-83', '???????????? ?????', null, 0.5000, 1.8000, 30, 200, null, null, null, '????? ? ???????', '')
insert into PRODUCTS values ('1', 97, 'NWTC-82', '???????', null, 3.0000, 5.0000, 50, 200, null, null, null, '????', '')
insert into PRODUCTS values ('6', 98, 'NWTSO-98', '??????? ???', null, 1.0000, 1.8900, 100, 200, null, null, null, '????', '')
insert into PRODUCTS values ('6', 99, 'NWTSO-99', '??????? ??????', null, 1.0000, 1.9500, 100, 200, null, null, null, '????', '')

other records were not inserted.