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Fixed bug caused by large ZIP codes #2

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Fixed bug caused by large ZIP codes #2

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17 changes: 10 additions & 7 deletions intelligent_mail_barcode.py
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Original file line number Diff line number Diff line change
Expand Up @@ -136,14 +136,17 @@ def convert_routing_code (zip):
raise ValueError (zip)

def unconvert_routing_code (n):
# Must be done in this order to avoid a negative return value in a case like a ZIP code of 999984444
if n > 0:
n -= 1

if n > 100000:
n -= 100000

if n > 1000000000:
return n - (1000000000 + 100000 + 1)
elif n > 100000:
return n - (100000 + 1)
elif n:
return n - 1
else:
return 0
n -= 1000000000

return n

def convert_tracking_code (enc, track):
assert (len (track) == 20)
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