import win32com.client
obj = win32com.client.Dispatch("Excel.Application")
obj.Visible = 1
obj.Workbooks.Add()
obj.Cells(1,1).Value = "Hello"

import csv
writer = csv.writer(open("some.csv", "wb"),delimiter = ';')
writer.writerow(['a','3'])

import random,csv
writer = csv.writer(open("some.csv", "wb"),delimiter = ';')
ls=[chr(x) for x in range(ord('a'),ord('z')+1)]+list('0123456789')
data=set()
while len(data)<10:
    x=random.choice(ls)+random.choice(ls) # если первый и второй могут быть одинаковыми
    data.add(x)
for i in data:
    writer.writerow([i])