os-path: Implement os.path.isfile().

Signed-off-by: Michael Hirsch <michael@scivision.dev>

python-stdlib/os-path/manifest.py

@@ -1,4 +1,4 @@
-metadata(version="0.1.4")
+metadata(version="0.2.0")
 
 # Originally written by Paul Sokolovsky.
 

python-stdlib/os-path/os/path.py

@@ -66,6 +66,13 @@ def isdir(path):
         return False
 
 
+def isfile(path):
+    try:
+        return bool(os.stat(path)[0] & 0x8000)
+    except OSError:
+        return False
+
+
 def expanduser(s):
     if s == "~" or s.startswith("~/"):
         h = os.getenv("HOME")

python-stdlib/os-path/test_path.py

@@ -20,3 +20,7 @@ assert not exists(dir + "/test_path.py--")
 assert isdir(dir + "/os")
 assert not isdir(dir + "/os--")
 assert not isdir(dir + "/test_path.py")
+
+assert not isfile(dir + "/os")
+assert isfile(dir + "/test_path.py")
+assert not isfile(dir + "/test_path.py--")