[KiField Bug] NameError: name 'reduce' is not defined

[Scott Candey]

Describe the bug
On an attempted extraction with groups from Kicad 5.1.10 schematic, Kifield crashes with a missing method "reduce". This issue is new since Kifield 0.1.17.

To Reproduce
Steps to reproduce the behavior:

1. kifield -x someschem.sch -i output.csv -g
2. See error

Traceback (most recent call last):
File "/usr/local/bin/kifield", line 8, in
sys.exit(main())
File "/usr/local/lib/python3.9/site-packages/kifield/main.py", line 141, in main
kifield(
File "/usr/local/lib/python3.9/site-packages/kifield/kifield.py", line 1505, in kifield
insert_part_fields(
File "/usr/local/lib/python3.9/site-packages/kifield/kifield.py", line 1470, in insert_part_fields
insertion_function(
File "/usr/local/lib/python3.9/site-packages/kifield/kifield.py", line 857, in insert_part_fields_into_xlsx
wb = group_wb(wb)
File "/usr/local/lib/python3.9/site-packages/kifield/kifield.py", line 103, in group_wb
grouped_rows.append((collapse(ref),) + unique_rows[i])
File "/usr/local/lib/python3.9/site-packages/kifield/common.py", line 242, in collapse
groups = reduce(make_groups, parts, [])
NameError: name 'reduce' is not defined

Expected behavior
Schematic should be extracted.

Desktop (please complete the following information):

• OS: Mac OS 11.3
• Python version: Python 3.9.5
• KiField version: 0.1.18
• KiCad version: 5.1.10

Additional context
A brief glance through common.py would suggest that it is missing an import, "from functools import reduce" that appeared in kifield.py from 0.1.17.

[xesscorp]

Thanks! This error forced my to update my pytests.