🆕 Add new subprocess test file

subprocess_test_2.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+import locale
+import os
+import subprocess
+
+if __name__ == "__main__":
+    print("*" * 100)
+    print(locale.getpreferredencoding())
+
+    print("*" * 100)
+    result = subprocess.run(
+        ['env'],
+        capture_output=True,
+    )
+    result.check_returncode()
+    print('return code:', result.returncode)
+    print(result.stdout)
+    print("*" * 100)
+    result = subprocess.run(
+        ['env'],
+        capture_output=True,
+        text=True,
+        encoding='utf-8',
+    )
+    result.check_returncode()
+    print('return code:', result.returncode)
+    print(f"{result.stdout[:100]}******")
+
+    print("*" * 100)
+    subprocess.run(
+        ['env'],
+        env={"NAME": "hatter"},
+    )
+
+    print("*" * 100)
+    my_env = os.environ.copy()
+    my_env["NAME"] = "hatter"
+    subprocess.run(
+        ['sleep', '5'],
+        env=my_env,
+        check=True,  # 非 0 返回时抛出异常
+    )
+
+    print("*" * 100)
+    subprocess.Popen(
+        ['sleep', '50'],
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+        preexec_fn=os.setpgrp  # 让子进程独立，即使当前脚本挂了它也继续运行
+    )
+
+    print("*" * 100)