Merge pull request #76 from brettcannon/fix_file_open

Have fix_open handle file()

Author: takluyver

libmodernize/fixes/fix_open.py

@@ -4,17 +4,13 @@
 import libmodernize
 
 
-class FixOpen(fixer_base.ConditionalFix):
+class FixOpen(fixer_base.BaseFix):
 
     BM_compatible = True
-    order = "pre"
-    skip_on = "io.open"
-
+    # Fixers don't directly stack, so make sure the 'file' case is covered.
     PATTERN = """
-    power< 'open' trailer< '(' any+ ')' > >
+    power< ('open' | 'file') trailer< '(' any+ ')' > >
     """
 
     def transform(self, node, results):
-        if self.should_skip(node):
-            return
         libmodernize.touch_import(u'io', u'open', node)

tests/test_fix_open.py

@@ -4,7 +4,7 @@
 
 
 OPEN = ("""\
-open('some/path')
+{0}('some/path')
 """, """\
 from __future__ import absolute_import
 from io import open
@@ -13,7 +13,13 @@
 
 
 def test_open():
-    check_on_input(*OPEN, extra_flags=['-f', 'libmodernize.fixes.fix_open'])
+    check_on_input(OPEN[0].format('open'), OPEN[1],
+                   extra_flags=['-f', 'libmodernize.fixes.fix_open'])
 
 def test_open_optional():
-    check_on_input(OPEN[0], OPEN[0])
+    check_on_input(OPEN[0].format('open'), OPEN[0].format('open'))
+
+def test_file():
+    flags = ['-f', 'libmodernize.fixes.fix_open',
+             '-f', 'libmodernize.fixes.fix_file']
+    check_on_input(OPEN[0].format('file'), OPEN[1], extra_flags=flags)