Class instantiation

[Colin J. Williams]

In the example below, with the disassembly following that, we run into 
trouble with the line:
    self.connect(fileID, mode= 'r')       # open sheet in the read mode

the traceback is:
Traceback (most recent call last):
   File "C:\Documents and Settings\cjw\My Documents\OODev\tArray.py", 
line 26, in __init__
     self.connect(fileID, mode= 'r')       # open sheet in the read mode
NameError: global name 'fileID' is not defined

At line 26, location 31, why is LOAD_GLOBAL generated for fileId, when 
LOAD_FAST has done the job at locations 0 and 20?

I would appreciate advice.

Colin W.

class arSpread(object):
   def __init__(self, fileId= None, ar= None):
     if fileId:
       if ar is not None:
         print fileId
         self.connect(fileID, mode= 'r')       # open sheet in the read mode
       else:
         self.connect(fileID, mode= 'w')       # open the sheet in the 
write mode
     if ar is not None:
       self.setArray(ar)



[Dbg]>>> dis.disassemble(arSpread.__init__.im_func.func_code)
  23           0 LOAD_FAST                1 (fileId)
               3 JUMP_IF_FALSE           64 (to 70)
               6 POP_TOP

  24           7 LOAD_FAST                2 (ar)
              10 LOAD_GLOBAL              2 (None)
              13 COMPARE_OP               9 (is not)
              16 JUMP_IF_FALSE           28 (to 47)
              19 POP_TOP

  25          20 LOAD_FAST                1 (fileId)
              23 PRINT_ITEM
              24 PRINT_NEWLINE

  26          25 LOAD_FAST                0 (self)
              28 LOAD_ATTR                4 (connect)
              31 LOAD_GLOBAL              5 (fileID)
              34 LOAD_CONST               1 ('mode')
              37 LOAD_CONST               2 ('r')
              40 CALL_FUNCTION          257
              43 POP_TOP
              44 JUMP_ABSOLUTE           71
         >>   47 POP_TOP