🐛 v1.3.2 (#79) Fixed an environment issue on Ubuntu 18.04.

* Change mutable default argument to `None`.

* Set to empty list if `keys` is `None`.

* Return if the given config is not a dictionary.

* Ensure `parsed_config` is a dictionary.

* Bump to version 1.3.2

meerschaum/config/_read_config.py

@@ -244,7 +244,11 @@ def search_and_substitute_config(
     """
 
     _links = []
-    def _find_symlinks(d, _keys: List[str] = []):
+    def _find_symlinks(d, _keys: Optional[List[str]] = None):
+        if _keys is None:
+            _keys = []
+        if not isinstance(d, dict):
+            return
         for k, v in d.items():
             if isinstance(v, dict):
                 _find_symlinks(v, _keys + [k])
@@ -345,7 +349,7 @@ def _find_symlinks(d, _keys: List[str] = []):
             haystack = haystack.replace(pattern, str(value))
 
     ### parse back into dict
-    parsed_config = json.loads(haystack)
+    parsed_config = json.loads(haystack) or {}
 
     symlinks = {}
     if keep_symlinks:

meerschaum/config/_version.py

@@ -2,4 +2,4 @@
 Specify the Meerschaum release version.
 """
 
-__version__ = "1.3.1"
+__version__ = "1.3.2"