Based on Topaco’s suggestion, finally it’s working, the code is as below:
data = b'123456789'
# the next cdefghijklmnopqrstuvwxyz is no needed
key = b'123456ab'
cipher = DES.new(key, DES.MODE_ECB)
ct = cipher.encrypt(pad(data, 8))
print(binascii.b2a_base64(ct))
FYI.
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