Bump pylint from 2.7.2 to 2.8.2 (#1729)

* Bump pylint from 2.7.2 to 2.8.2

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.7.2 to 2.8.2.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/pylint-2.7.2...v2.8.2)

Signed-off-by: dependabot[bot] <support@github.com>

* fix pylint

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>

esphome/dashboard/dashboard.py

@@ -515,7 +515,7 @@ class MDNSStatusThread(threading.Thread):
 
 class PingStatusThread(threading.Thread):
     def run(self):
-        pool = multiprocessing.Pool(processes=8)
+        with multiprocessing.Pool(processes=8) as pool:
             while not STOP_EVENT.is_set():
                 # Only do pings if somebody has the dashboard open
 

esphome/espota2.py

@@ -296,7 +296,7 @@ def run_ota_impl_(remote_host, remote_port, password, filename):
         _LOGGER.error("Connecting to %s:%s failed: %s", remote_host, remote_port, err)
         return 1
 
-    file_handle = open(filename, "rb")
+    with open(filename, "rb") as file_handle:
         try:
             perform_ota(sock, password, file_handle, filename)
         except OTAError as err:
@@ -304,7 +304,6 @@ def run_ota_impl_(remote_host, remote_port, password, filename):
             return 1
         finally:
             sock.close()
-        file_handle.close()
 
     return 0
 

esphome/helpers.py

@@ -60,7 +60,7 @@ def cpp_string_escape(string, encoding="utf-8"):
 def run_system_command(*args):
     import subprocess
 
-    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    with subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) as p:
         stdout, stderr = p.communicate()
         rc = p.returncode
         return rc, stdout, stderr

requirements_test.txt

@@ -1,4 +1,4 @@
-pylint==2.7.2
+pylint==2.8.2
 flake8==3.9.0
 black==21.5b0
 pillow>4.0.0