Add context manager test...

handle degenerate 3.8 withas

test/simple_source/stmts/08_test_contextmanager.py

@@ -0,0 +1,21 @@
+"""
+This program is self checking!
+"""
+
+
+class TestContextManager:
+    def __enter__(self):
+        return 1, 2
+
+    def __exit__(self, exc_type, exc_value, exc_tb):
+        return self, exc_type, exc_value, exc_tb
+
+
+with open(__file__) as a:
+    assert a
+
+with open(__file__) as a, open(__file__) as b:
+    assert a.read() == b.read()
+
+with TestContextManager() as a, b:
+    assert (a, b) == (1, 2)

uncompyle6/parsers/parse38.py

@@ -586,6 +586,15 @@ def customize_grammar_rules(self, tokens, customize):
                                     GET_ITER CALL_FUNCTION_1
                        """
                     self.addRule(rule, nop_func)
+            elif opname == "SETUP_WITH":
+                rules_str = """
+                  stmt        ::= with_as_pass
+                  with_as_pass ::= expr
+                                   SETUP_WITH store pass
+                                   POP_BLOCK BEGIN_FINALLY COME_FROM_WITH
+                                   with_suffix
+                 """
+                self.addRule(rules_str, nop_func)
 
     def reduce_is_invalid(self, rule, ast, tokens, first, last):
         invalid = super(Python38Parser, self).reduce_is_invalid(

uncompyle6/semantics/consts.py

@@ -272,8 +272,6 @@
         (2, NO_PARENTHESIS_EVER)
         ),
 
-    "IMPORT_FROM": ("%{pattr}",),
-    "IMPORT_NAME_ATTR": ("%{pattr}",),
     "attribute": ("%c.%[1]{pattr}", (0, "expr")),
     "delete_subscript": (
         "%|del %p[%c]\n",
@@ -431,7 +429,12 @@
 
     # If there are situations where we need "with ... as ()"
     # We may need to customize this in n_withasstmt
-    "withasstmt": ("%|with %c as %c:\n%+%c%-", 0, 2, 3),
+    "withasstmt": (
+        "%|with %c as %c:\n%+%c%-",
+        (0, "expr"),
+        (2, "store"),
+        (3, ("suite_stmts_opt", "suite_stmts")),
+    ),
 
     "expr_stmt": (
         "%|%p\n",

uncompyle6/semantics/customize38.py

@@ -23,8 +23,8 @@
 from uncompyle6.semantics.customize37 import FSTRING_CONVERSION_MAP
 from uncompyle6.semantics.helper import escape_string, strip_quotes
 
-def customize_for_version38(self, version):
 
+def customize_for_version38(self, version):
     # FIXME: pytest doesn't add proper keys in testing. Reinstate after we have fixed pytest.
     # for lhs in 'for forelsestmt forelselaststmt '
     #             'forelselaststmtc tryfinally38'.split():
@@ -40,10 +40,10 @@ def customize_for_version38(self, version):
             ),
             "async_forelse_stmt38": (
                 "%|async for %c in %c:\n%+%c%-%|else:\n%+%c%-\n\n",
-                (7, 'store'),
-                (0, 'expr'),
-                (8, 'for_block'),
-                (-1, 'else_suite')
+                (7, "store"),
+                (0, "expr"),
+                (8, "for_block"),
+                (-1, "else_suite"),
             ),
             "async_with_stmt38": (
                 "%|async with %c:\n%+%c%-\n",
@@ -70,8 +70,15 @@ def customize_for_version38(self, version):
             ),
             # Python 3.8 reverses the order of keys and items
             # from all prior versions of Python.
-            "dict_comp_body": ("%c: %c", (0, "expr"), (1, "expr"),),
-            "except_cond1a": ("%|except %c:\n", (1, "expr"),),
+            "dict_comp_body": (
+                "%c: %c",
+                (0, "expr"),
+                (1, "expr"),
+            ),
+            "except_cond1a": (
+                "%|except %c:\n",
+                (1, "expr"),
+            ),
             "except_cond_as": (
                 "%|except %c as %c:\n",
                 (1, "expr"),
@@ -121,10 +128,19 @@ def customize_for_version38(self, version):
                 -2,
             ),
             "ifpoplaststmtc": ("%|if %c:\n%+%c%-", (0, "testexpr"), (2, "l_stmts")),
+            "named_expr": (  # AKA "walrus operator"
+                "%c := %p",
+                (2, "store"),
+                (0, "expr", PRECEDENCE["named_expr"] - 1),
+            ),
             "pop_return": ("%|return %c\n", (1, "return_expr")),
             "popb_return": ("%|return %c\n", (0, "return_expr")),
             "pop_ex_return": ("%|return %c\n", (0, "return_expr")),
-            "set_for": (" for %c in %c", (2, "store"), (0, "expr_or_arg"),),
+            "set_for": (
+                " for %c in %c",
+                (2, "store"),
+                (0, "expr_or_arg"),
+            ),
             "whilestmt38": (
                 "%|while %c:\n%+%c%-\n\n",
                 (1, ("bool_op", "testexpr", "testexprc")),
@@ -211,10 +227,11 @@ def customize_for_version38(self, version):
                 (2, "suite_stmts_opt"),
                 (8, "suite_stmts_opt"),
             ),
-            "named_expr": (  # AKA "walrus operator"
-                "%c := %p",
+            "with_as_pass": (
+                "%|with %c as %c:\n%+%c%-",
+                (0, "expr"),
                 (2, "store"),
-                (0, "expr", PRECEDENCE["named_expr"] - 1),
+                (3, "pass"),
             ),
         }
     )