[ARROW-17832] [Python] Construct MapArray from sequence of dicts (instead of list of tuples)

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 11.0.0
• Component/s: Python
• Labels: pull-request-available python-conversion
• External issue URL: https://github.com/apache/arrow/issues/33053
• Assignee: Kshiteej K
• Reporter: Joris Van den Bossche
• Created: 23/Sep/22 16:07
• Updated: 11/Jan/23 11:56
• Resolved: 09/Nov/22 10:07

Description

From https://github.com/apache/arrow/issues/14116

Creating a MapArray from a python sequence currently requires lists of tuples as values:

arr = pa.array([[('a', 1), ('b', 2)], [('c', 3)]], pa.map_(pa.string(), pa.int64()))

While I think it makes sense that the following could also work (using dicts instead):

arr = pa.array([{'a': 1, 'b': 2}, {'c': 3}], pa.map_(pa.string(), pa.int64()))

Issue Links

• links to: GitHub Pull Request #14547