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Converting Code Sets Using a Dictionary |
If your code sets are large, you can use a dictionary to map one set of codes to another. A dictionary is easier to update than a complicated conditional statement.
The following example uses a dictionary to map locations to location codes:
locationtable = {
'Toronto': '011',
'New York': '023',
'London': '030',
'Paris': '041',
'Moscow': '055',
'Beijing': '062',
}
if location in locationtable:
locationid = locationtable[location]
else:
# use '000' to represent an unknown location
locationid = '000'
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To add a new location, all you need to do is add a new key-value pair to the dictionary:
locationtable = {
'Toronto': '011',
'New York': '023',
'London': '030',
'Paris': '041',
'Moscow': '055',
'Beijing': '062',
'Tokyo': '087',
}
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For more information on dictionaries, see the section on Dictionaries. | ||
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