Static code analysis and corrections

backend/venv/lib/python3.6/site-packages/libpasteurize/fixes/fix_division.py

@@ -0,0 +1,28 @@
+u"""
+Fixer for division: from __future__ import division if needed
+"""
+
+from lib2to3 import fixer_base
+from libfuturize.fixer_util import token, future_import
+
+def match_division(node):
+    u"""
+    __future__.division redefines the meaning of a single slash for division,
+    so we match that and only that.
+    """
+    slash = token.SLASH
+    return node.type == slash and not node.next_sibling.type == slash and \
+                                  not node.prev_sibling.type == slash
+
+class FixDivision(fixer_base.BaseFix):
+    run_order = 4    # this seems to be ignored?
+
+    def match(self, node):
+        u"""
+        Since the tree needs to be fixed once and only once if and only if it
+        matches, then we can start discarding matches after we make the first.
+        """
+        return match_division(node)
+
+    def transform(self, node, results):
+        future_import(u"division", node)