From 37fa60b201d1f8b253183579753804e2c7510a69 Mon Sep 17 00:00:00 2001
From: Alex Telon <alex.telon@gmail.com>
Date: Fri, 25 Oct 2019 17:32:21 +0200
Subject: [PATCH] Unflatten for lists by benbowen

unflatten does not support lists, the github user benbowen created an
issue: https://github.com/ianlini/flatten-dict/issues/8 and described a
solution that worked for him.
---
 src/flatten_dict/flatten_dict.py | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/flatten_dict/flatten_dict.py b/src/flatten_dict/flatten_dict.py
index 9e46e78..8bd92bf 100644
--- a/src/flatten_dict/flatten_dict.py
+++ b/src/flatten_dict/flatten_dict.py
@@ -101,11 +101,25 @@ def nested_set_dict(d, keys, value):
     assert keys
     key = keys[0]
     if len(keys) == 1:
-        if key in d:
-            raise ValueError("duplicated key '{}'".format(key))
-        d[key] = value
+        if type(d) == list:
+            d.append(value)
+        else:
+            d[key] = value
         return
-    d = d.setdefault(key, {})
+
+    # the type is a string so make a dict if none exists
+    if type(keys[1]) == int:
+        if key in d:
+            pass
+        else:
+            d[key] = []
+        d = d[key]
+    elif type(key)==int:
+        if (key+1) > len(d):
+            d.append({})
+        d = d[key]
+    else:
+        d = d.setdefault(key, {})
     nested_set_dict(d, keys[1:], value)