Don't use 'async' as a keyword argument (#94)

Fixes #86

.travis.yml

@@ -9,9 +9,11 @@ python:
   - 3.6
   - pypy
   - pypy3.3-5.2-alpha1
+  - 3.7-dev
 matrix:
   allow_failures:
   - python: 2.6
+  - python: 3.7-dev
 cache: pip
 install:
   - pip install tox-travis

astor/code_gen.py

@@ -308,8 +308,8 @@ class SourceGenerator(ExplicitNodeVisitor):
         self.statement(node)
         self.generic_visit(node)
 
-    def visit_FunctionDef(self, node, async=False):
-        prefix = 'async ' if async else ''
+    def visit_FunctionDef(self, node, is_async=False):
+        prefix = 'async ' if is_async else ''
         self.decorators(node, 1 if self.indentation else 2)
         self.statement(node, '%sdef %s' % (prefix, node.name), '(')
         self.visit_arguments(node.args)
@@ -322,7 +322,7 @@ class SourceGenerator(ExplicitNodeVisitor):
 
     # introduced in Python 3.5
     def visit_AsyncFunctionDef(self, node):
-        self.visit_FunctionDef(node, async=True)
+        self.visit_FunctionDef(node, is_async=True)
 
     def visit_ClassDef(self, node):
         have_args = []
@@ -364,24 +364,24 @@ class SourceGenerator(ExplicitNodeVisitor):
                 self.else_body(else_)
                 break
 
-    def visit_For(self, node, async=False):
+    def visit_For(self, node, is_async=False):
         set_precedence(node, node.target)
-        prefix = 'async ' if async else ''
+        prefix = 'async ' if is_async else ''
         self.statement(node, '%sfor ' % prefix,
                        node.target, ' in ', node.iter, ':')
         self.body_or_else(node)
 
     # introduced in Python 3.5
     def visit_AsyncFor(self, node):
-        self.visit_For(node, async=True)
+        self.visit_For(node, is_async=True)
 
     def visit_While(self, node):
         set_precedence(node, node.test)
         self.statement(node, 'while ', node.test, ':')
         self.body_or_else(node)
 
-    def visit_With(self, node, async=False):
-        prefix = 'async ' if async else ''
+    def visit_With(self, node, is_async=False):
+        prefix = 'async ' if is_async else ''
         self.statement(node, '%swith ' % prefix)
         if hasattr(node, "context_expr"):  # Python < 3.3
             self.visit_withitem(node)
@@ -392,7 +392,7 @@ class SourceGenerator(ExplicitNodeVisitor):
 
     # new for Python 3.5
     def visit_AsyncWith(self, node):
-        self.visit_With(node, async=True)
+        self.visit_With(node, is_async=True)
 
     # new for Python 3.3
     def visit_withitem(self, node):

docs/changelog.rst

@@ -2,6 +2,27 @@
 Release Notes
 =============
 
+0.7.0 - 2018-03-24
+------------------
+
+New features
+~~~~~~~~~~~~
+
+* Added initial support for Python 3.7.0.
+
+  Note that if you have a subclass of ``astor.code_gen.SourceGenerator``, you
+  may need to rename the keyword argument ``async`` of the following methods
+  to ``is_async``:
+
+  - ``visit_FunctionDef(..., is_async=False)``
+  - ``visit_For(..., is_async=False)``
+  - ``visit_With(..., is_async=False)``
+
+  (Reported and fixed by Berker Peksag in `Issue 86`_.)
+
+.. _`Issue 86`: https://github.com/berkerpeksag/astor/issues/86
+
+
 0.6.2 - 2017-11-11
 ------------------