What does zip mean?
steve+comp.lang.python at pearwood.info
Sun Nov 9 11:58:00 CET 2014
satishmlmlml at gmail.com wrote:
> What does zip return in the following piece of code?
Have you read the Fine Manual?
In Python 2, zip returns a list:
zip(['a', 'b', 'c'], [1, 2, 3])
=> [('a', 1), ('b', 2), ('c', 3)]
In Python 3, zip does the same, except instead of a list, it returns a
special iterator which produces the items on demand rather than in advance.
> curs.execute('select * from people')
> colnames = [desc for desc in curs.description]
> rowdicts = 
> for row in curs.fetchall():
> rowdicts.append(dict(zip(colnames, row)))
zip(colnames, row) will return:
(first column name, first item of row),
(second column name, second item of row),
(third column name, third item of row),
More information about the Python-list