1 files changed, 20 insertions, 19 deletions
diff --git a/coverage/data.py b/coverage/data.py
index 9c82ccef..44b75439 100644
--- a/coverage/data.py
+++ b/coverage/data.py
@@ -244,25 +244,6 @@ class CoverageJsonData(object):
         """A list of all files that had been measured."""
         return list(self._arcs or self._lines or {})
 
-    def line_counts(self, fullpath=False):
-        """Return a dict summarizing the line coverage data.
-
-        Keys are based on the file names, and values are the number of executed
-        lines.  If `fullpath` is true, then the keys are the full pathnames of
-        the files, otherwise they are the basenames of the files.
-
-        Returns a dict mapping file names to counts of lines.
-
-        """
-        summ = {}
-        if fullpath:
-            filename_fn = lambda f: f
-        else:
-            filename_fn = os.path.basename
-        for filename in self.measured_files():
-            summ[filename_fn(filename)] = len(self.lines(filename))
-        return summ
-
     def __nonzero__(self):
         return bool(self._lines or self._arcs)
 
@@ -662,6 +643,26 @@ elif which == "sql":
     CoverageData = CoverageSqliteData
 
 
+def line_counts(data, fullpath=False):
+    """Return a dict summarizing the line coverage data.
+
+    Keys are based on the file names, and values are the number of executed
+    lines.  If `fullpath` is true, then the keys are the full pathnames of
+    the files, otherwise they are the basenames of the files.
+
+    Returns a dict mapping file names to counts of lines.
+
+    """
+    summ = {}
+    if fullpath:
+        filename_fn = lambda f: f
+    else:
+        filename_fn = os.path.basename
+    for filename in data.measured_files():
+        summ[filename_fn(filename)] = len(data.lines(filename))
+    return summ
+
+
 def add_data_to_hash(data, filename, hasher):
     """Contribute `filename`'s data to the `hasher`.