def zzz():
    x= None
    code= '''
for x in (1, 3, 6, 9 ,12) :
        self.ui.lineEdit_xmah.setEnabled(True)
    '''
    con={}
    con["x"]= x
    exec(code, con)

==error :

Traceback (most recent call last):
  File "/home/alireza/WorkspaceAptanaS/test-pyqt-project/s.py", line 67, in chBoxSer_status
    zzz()
  File "/home/alireza/WorkspaceAptanaS/test-pyqt-project/s.py", line 37, in zzz
    exec(code, con)
  File "<string>", line 3, in <module>
NameError: name 'self' is not defined


===== OR
def zzz():
    x= None
    code= '''
for x in (1, 3, 6, 9 ,12) :
    self.ui.lineEdit_xmah.setEnabled(True)
    '''
    con={}
    con["x"]= x
    exec(code, con)
==error :
Traceback (most recent call last):
  File "/home/alireza/WorkspaceAptanaS/test-pyqt-project/s.py", line 67, in chBoxSer_status
    zzz()
  File "/home/alireza/WorkspaceAptanaS/test-pyqt-project/s.py", line 37, in zzz
    exec(code, con)
  File "<string>", line 3, in <module>
NameError: name 'self' is not defined