Hi Bilal
Actually, if you want to use this list during the update process, I would like to suggest to put it in the dictionary.
for example.
abc = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
ind1 = 0
ind2 = 0
preStr= {}
for i in range(0,26):
for j in range(0,26):
preStr[ind] = 'A{0}{1}'.format(abc,abc)
ind1 = ind1 + 1
fc = "c:/data/base.gdb/roads"
field1 = "field1"
field2 = "field2"
cursor = arcpy.UpdateCursor(fc)
for row in cursor:
row.setValue(field2, preStr[ind2] + row.getValue(field1) * 3.0)
ind2 = ind2 + 1
cursor.updateRow(row)
cursor.updateRow(row)
Hopefully, it works for you.
Regards,
Bing