Move Python code to its own directory.

bin/python/ripple/util/Range.py

@@ -0,0 +1,53 @@
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+"""
+Convert a discontiguous range of integers to and from a human-friendly form.
+
+Real world example is the server_info.complete_ledgers:
+  8252899-8403772,8403824,8403827-8403830,8403834-8403876
+
+"""
+
+def from_string(desc, **aliases):
+    if not desc:
+        return []
+    result = set()
+    for d in desc.split(','):
+        nums = [int(aliases.get(x) or x) for x in d.split('-')]
+        if len(nums) == 1:
+            result.add(nums[0])
+        elif len(nums) == 2:
+            result.update(range(nums[0], nums[1] + 1))
+    return result
+
+def to_string(r):
+    groups = []
+    next_group = []
+    for i, x in enumerate(sorted(r)):
+        if next_group and (x - next_group[-1]) > 1:
+            groups.append(next_group)
+            next_group = []
+        next_group.append(x)
+    if next_group:
+        groups.append(next_group)
+
+    def display(g):
+        if len(g) == 1:
+            return str(g[0])
+        else:
+            return '%s-%s' % (g[0], g[-1])
+
+    return ','.join(display(g) for g in groups)
+
+def is_range(desc, *names):
+    try:
+        from_string(desc, **dict((n, 1) for n in names))
+        return True;
+    except ValueError:
+        return False
+
+def join_ranges(*ranges, **aliases):
+    result = set()
+    for r in ranges:
+        result.update(from_string(r, **aliases))
+    return result