Support os.environ.get

Signed-off-by: harupy <[email protected]>

Author: harupy

doc/data/messages/i/invalid-envvar-default/bad.py

@@ -1,3 +1,4 @@
 import os
 
 env = os.getenv("SECRET_KEY", 1)  # [invalid-envvar-default]
+env = os.environ.get("SECRET_KEY", 1)  # [invalid-envvar-default]

doc/data/messages/i/invalid-envvar-default/good.py

@@ -1,3 +1,4 @@
 import os
 
 env = os.getenv("SECRET_KEY", "1")
+env = os.environ.get("SECRET_KEY", "1")

pylint/checkers/stdlib.py

@@ -30,7 +30,7 @@
 THREADING_THREAD = "threading.Thread"
 COPY_COPY = "copy.copy"
 OS_ENVIRON = "os._Environ"
-ENV_GETTERS = ("os.getenv",)
+ENV_GETTERS = ("os.getenv", "os.environ.get")
 SUBPROCESS_POPEN = "subprocess.Popen"
 SUBPROCESS_RUN = "subprocess.run"
 OPEN_MODULE = {"_io", "pathlib", "pathlib._local"}