Add N810 specifically for package or module imports

README.rst

@@ -54,9 +54,12 @@ These error codes are emitted:
 +---------+-----------------------------------------------------------------+
 | _`N807` | function name should not start and end with '__'                |
 +---------+-----------------------------------------------------------------+
+| _`N810` | package or module imported as non lowercase                     |
+|         | (`package and module names`_)                                   |
++---------+-----------------------------------------------------------------+
 | _`N811` | constant imported as non constant (`constants`_)                |
 +---------+-----------------------------------------------------------------+
-| _`N812` | lowercase imported as non-lowercase                             |
+| _`N812` | lowercase imported as non lowercase                             |
 +---------+-----------------------------------------------------------------+
 | _`N813` | camelcase imported as lowercase                                 |
 +---------+-----------------------------------------------------------------+
@@ -80,7 +83,7 @@ These error codes are emitted:
 .. _function names: https://www.python.org/dev/peps/pep-0008/#function-and-variable-names
 .. _function arguments: https://www.python.org/dev/peps/pep-0008/#function-and-method-arguments
 .. _method names: https://www.python.org/dev/peps/pep-0008/#method-names-and-instance-variables
-
+.. _package and module names: https://peps.python.org/pep-0008/#package-and-module-names
 Options
 -------
 

src/pep8ext_naming.py

@@ -385,12 +385,21 @@ class ImportAsCheck(BaseASTCheck):
     """
     Don't change the naming convention via an import
     """
+    N810 = "package or module '{name}' imported as non lowercase '{asname}'"
     N811 = "constant '{name}' imported as non constant '{asname}'"
     N812 = "lowercase '{name}' imported as non lowercase '{asname}'"
     N813 = "camelcase '{name}' imported as lowercase '{asname}'"
     N814 = "camelcase '{name}' imported as constant '{asname}'"
     N817 = "camelcase '{name}' imported as acronym '{asname}'"
 
+    def visit_import(self, node, parents, ignore=None):
+        for name in node.names:
+            asname = name.asname
+            if not asname:
+                continue
+            if asname.lower() != asname:
+                yield self.err(node, 'N810', name=name.name, asname=asname)
+
     def visit_importfrom(self, node, parents, ignore=None):
         for name in node.names:
             asname = name.asname
@@ -412,8 +421,6 @@ def visit_importfrom(self, node, parents, ignore=None):
                 else:
                     yield self.err(node, 'N814', **err_kwargs)
 
-    visit_import = visit_importfrom
-
 
 class VariablesCheck(BaseASTCheck):
     """

testsuite/N810.py

@@ -0,0 +1,18 @@
+#: N810:1:1
+import os as OS
+#: Okay
+import os as myos
+#: Okay
+import good as good
+#: Okay
+import GOOD as good
+#: N810:1:1
+import good as BAD
+#: N810:1:1
+import good as Bad
+#: Okay
+import underscore as _
+#: Okay
+import good as γ
+#: N810:1:1
+import GOOD as Γ

testsuite/N81x.py

@@ -1,16 +1,12 @@
-#: N812:1:1
-import os as OS
-#: Okay
-import os as myos
-#: Okay
-import good as good
 #: Okay
-import underscore as _
+from mod import underscore as _
 #: Okay
 from mod import good as nice, NICE as GOOD, Camel as Memel
 #: N811:1:1
 from mod import GOOD as bad
 #: N812:1:1
+from mod import good as BAD
+#: N812:1:1
 from mod import good as Bad
 #: N813:1:1
 from mod import CamelCase as noncamle
@@ -19,12 +15,8 @@
 #: N817:1:1
 from mod import CamelCase as CC
 #: Okay
-import good as γ
-#: Okay
 from mod import good as γ
 #: Okay
-import GOOD as Γ
-#: Okay
 from mod import GOOD as Γ
 #: Okay
 from mod import GOOD as Γ1