Add "py", a CLI for python one-liners

.mgr_config/bin/py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+
+import argparse
+import sys
+
+from pathlib import Path
+
+source = " ".join(sys.argv[1:])
+INPUT_SRC_NAME = "<py-input>"
+
+global_vars = {}
+local_vars = {}
+
+py_env_conf = Path.home() / ".py-env.py"
+if py_env_conf.exists():
+    with open(Path.home() / ".py-env.py") as f:
+        code = compile(f.read(), "py-env.py", "exec")
+        exec(code)
+
+try:
+    code = compile(source, INPUT_SRC_NAME, "eval")
+    val = eval(code)
+
+    # If it's a string, just print it
+    if type(val) == str:
+        print(val)
+        exit(0)
+
+    # If it's not iterable, just print it
+    try:
+        it = iter(val)
+    except TypeError as e:
+        if val is not None:
+            print(val)
+        exit(0)
+
+    # It's iterable, print each element as a line
+    try:
+        for item in val:
+            print(item)
+        exit(0)
+    except Exception as e:
+        e.args = ("Failed to print all elements",) + e.args
+        raise
+
+except (SyntaxError, NameError) as e:
+    pass
+
+try:
+    code = compile(source, INPUT_SRC_NAME, "exec")
+    exec(code)
+except (SyntaxError, NameError) as e:
+    e.args = ("Invalid Python code",) + e.args
+    raise e