question on global variables
marklists at mceahern.com
Thu Oct 10 14:41:00 CEST 2002
> There is data that I am returning - but this particular item happens
> to be the number of records returned from a query (the data set is
> returned). And I am using it everywhere. It is set in the query
> function - which is called once. I tried using different calling and
> return options, and finally came to the conclusion that what I
> really did want was the gloabal variable.
In other words, you're caching the results?
def __init__(self, results):
self.results = results
count = property(getCount)
sql = "select * from whatever;"
conn = db.open(connStr)
raw_results = conn.execute(sql)
results = Results(results)
Now you can pass results around to your heart's content and get the count of
the results without ever having to execute the SQL again. I still don't
understand why you need a global variable. You realize most folks eschew
their use? Why? Because they riddle your code with dependencies that are
hard to analyze, test, debug, etc.
More information about the Python-list