Modernize code with `pyupgrade --py37-plus`

[Nothing4You]

What do these changes do?

Modernize code to Python 3.7+ syntax.

Are there changes in behavior for the user?

Backwards compatibility to versions below Python 3.7 may get lost if this didn't already happen previously.

Related issue number

-

Checklist

• [x] I think the code is well written
• [x] Unit tests for the changes exist
• [x] Documentation reflects the changes
• [x] Add a new news fragment to CHANGES.txt

[codecov[bot]]

Codecov Report

Merging #930 (98ad0fe) into master (7ddfd3f) will decrease coverage by 0.04%. The diff coverage is 86.36%.

@@            Coverage Diff             @@
##           master     #930      +/-   ##
==========================================
- Coverage   93.68%   93.64%   -0.04%     
==========================================
  Files          36       36              
  Lines        5538     5538              
  Branches      895      895              
==========================================
- Hits         5188     5186       -2     
- Misses        260      262       +2     
  Partials       90       90              

Flag	Coverage Δ
CI-GHA	93.24% <86.36%> (-0.04%)	:arrow_down:
DB-mariadb-10.3	90.30% <86.36%> (ø)
DB-mariadb-10.4	90.30% <86.36%> (ø)
DB-mariadb-10.5	90.28% <86.36%> (ø)
DB-mariadb-10.6	90.28% <86.36%> (ø)
DB-mariadb-10.7	90.28% <86.36%> (ø)
DB-mariadb-10.8	90.28% <86.36%> (ø)
DB-mysql-5.7	90.98% <86.36%> (ø)
DB-mysql-8.0	92.37% <81.81%> (-0.04%)	:arrow_down:
OS-Linux	93.24% <86.36%> (-0.04%)	:arrow_down:
Py-3.10.11	93.15% <86.36%> (ø)
Py-3.11.3	93.15% <86.36%> (-0.04%)	:arrow_down:
Py-3.7.16	92.78% <86.36%> (ø)
Py-3.8.16	93.18% <86.36%> (ø)
Py-3.9.16	93.02% <86.36%> (ø)
VM-ubuntu-latest	93.24% <86.36%> (-0.04%)	:arrow_down:
ubuntu-latest_3.10_mariadb-10.3	90.21% <86.36%> (ø)
ubuntu-latest_3.10_mariadb-10.4	90.21% <86.36%> (ø)
ubuntu-latest_3.10_mariadb-10.5	90.19% <86.36%> (ø)
ubuntu-latest_3.10_mariadb-10.6	90.19% <86.36%> (ø)
ubuntu-latest_3.10_mariadb-10.7	90.19% <86.36%> (ø)
ubuntu-latest_3.10_mariadb-10.8	90.19% <86.36%> (ø)
ubuntu-latest_3.10_mysql-5.7	90.89% <86.36%> (ø)
ubuntu-latest_3.10_mysql-8.0	92.28% <81.81%> (ø)
ubuntu-latest_3.11_mariadb-10.3	90.21% <86.36%> (ø)
ubuntu-latest_3.11_mariadb-10.4	90.21% <86.36%> (ø)
ubuntu-latest_3.11_mariadb-10.5	90.19% <86.36%> (ø)
ubuntu-latest_3.11_mariadb-10.6	90.19% <86.36%> (ø)
ubuntu-latest_3.11_mariadb-10.7	90.19% <86.36%> (ø)
ubuntu-latest_3.11_mariadb-10.8	90.19% <86.36%> (ø)
ubuntu-latest_3.11_mysql-5.7	90.89% <86.36%> (ø)
ubuntu-latest_3.11_mysql-8.0	92.28% <81.81%> (-0.04%)	:arrow_down:
ubuntu-latest_3.7_mariadb-10.3	89.66% <86.36%> (ø)
ubuntu-latest_3.7_mariadb-10.4	89.66% <86.36%> (ø)
ubuntu-latest_3.7_mariadb-10.5	89.64% <86.36%> (ø)
ubuntu-latest_3.7_mariadb-10.6	89.64% <86.36%> (ø)
ubuntu-latest_3.7_mariadb-10.7	89.64% <86.36%> (ø)
ubuntu-latest_3.7_mariadb-10.8	89.64% <86.36%> (ø)
ubuntu-latest_3.7_mysql-5.7	90.39% <86.36%> (ø)
ubuntu-latest_3.7_mysql-8.0	91.86% <81.81%> (ø)
ubuntu-latest_3.8_mariadb-10.3	90.25% <86.36%> (ø)
ubuntu-latest_3.8_mariadb-10.4	90.25% <86.36%> (ø)
ubuntu-latest_3.8_mariadb-10.5	90.23% <86.36%> (ø)
ubuntu-latest_3.8_mariadb-10.6	90.23% <86.36%> (ø)
ubuntu-latest_3.8_mariadb-10.7	90.23% <86.36%> (ø)
ubuntu-latest_3.8_mariadb-10.8	90.23% <86.36%> (ø)
ubuntu-latest_3.8_mysql-5.7	90.94% <86.36%> (ø)
ubuntu-latest_3.8_mysql-8.0	92.31% <81.81%> (ø)
ubuntu-latest_3.9_mariadb-10.3	90.09% <86.36%> (ø)
ubuntu-latest_3.9_mariadb-10.4	90.09% <86.36%> (ø)
ubuntu-latest_3.9_mariadb-10.5	90.07% <86.36%> (ø)
ubuntu-latest_3.9_mariadb-10.6	90.07% <86.36%> (ø)
ubuntu-latest_3.9_mariadb-10.7	90.07% <86.36%> (ø)
ubuntu-latest_3.9_mariadb-10.8	90.07% <86.36%> (ø)
ubuntu-latest_3.9_mysql-5.7	90.77% <86.36%> (ø)
ubuntu-latest_3.9_mysql-8.0	92.15% <81.81%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
tests/conftest.py	87.00% <33.33%> (ø)
aiomysql/connection.py	84.26% <87.50%> (ø)
aiomysql/cursors.py	92.55% <100.00%> (ø)
aiomysql/sa/transaction.py	96.00% <100.00%> (ø)
tests/test_basic.py	98.11% <100.00%> (ø)
tests/test_issues.py	85.93% <100.00%> (-0.63%)	:arrow_down:
tests/test_sha_connection.py	100.00% <100.00%> (ø)
tests/test_sscursor.py	98.75% <100.00%> (ø)

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