Inconsistency in check/pylint

[95-martin-orion]

Description of the issue

PR #3698 hit the following pylint errors:

************* Module cirq.study.sweepable
cirq/study/sweepable.py:17:0: W0611: Unused Dict imported from typing (unused-import)
************* Module cirq.optimizers.align_right
cirq/optimizers/align_right.py:17:0: W0611: Unused ops imported from cirq (unused-import)
************* Module cirq.optimizers.align_left
cirq/optimizers/align_left.py:17:0: W0611: Unused ops imported from cirq (unused-import)

These files were not modified in this PR; as far as I can tell, the issues above were introduced in #3643 and #3644. Strangely, those PRs did not get flagged by the pylint checker.

I have confirmed that all three PRs listed here used pylint-2.6.0 in their checks.

How to reproduce the issue

Unclear. It seems like check/pylint behaves inconsistently in PR tests; we should double-check that it's set up correctly.

Cirq version
v0.10.0-dev

[95-martin-orion]

I was not able to reproduce this locally on branch 95-martin-orion:cirq-expects-values, despite both issues being present on inspection.

[balopat]

On My Mac, I see only the Unused Dict imported from typing (unused-import) error, the other too doesn't show up. It's odd that pylint is inconsistent between environments.

[tonybruguier]

I can find some issues locally. I'm using ubuntu and it happens to be an ec2 instance, so I could share access with someone if they want to repro (or run some commands to help track things).

[vtomole]

Some pylint errors on my local machine from the main branch

Description of the issue

(venv8) (base) vtomole@vtomole:~/Cirq$ ./check/pylint
************* Module cirq.ops.pauli_string_test
cirq-core/cirq/ops/pauli_string_test.py:1302:23: E1121: Too many positional arguments for method call (too-many-function-args)
************* Module cirq.ops.gate_operation
cirq-core/cirq/ops/gate_operation.py:199:19: E1102: getter is not callable (not-callable)
************* Module cirq_ionq.service
cirq-ionq/cirq_ionq/service.py:115:19: E1123: Unexpected keyword argument 'seed' in method call (unexpected-keyword-arg)

Cirq version

(venv8) (base) vtomole@vtomole:~/Cirq$ pylint --version
pylint 2.6.0
astroid 2.5
Python 3.8.5 (default, Sep  4 2020, 07:30:14) 
[GCC 7.3.0]

[95-martin-orion]

Marking resolved since I can't remember seeing this since the two PRs above.