Add None/nan tolerant string join function

fmtr/tools/string_tools.py

@@ -4,6 +4,8 @@
 from string import Formatter
 from typing import List
 
+from fmtr.tools.datatype_tools import is_none
+
 ELLIPSIS = '…'
 formatter = Formatter()
 
@@ -106,6 +108,18 @@ def flatten(raw):
     return text
 
 
+def join(strings, sep=' '):
+    """
+
+    Join a list of strings while removing Nones
+
+    """
+
+    lines = [string for string in strings if not is_none(string) and string != '']
+    text = sep.join(str(line) for line in lines)
+    return text
+
+
 class Mask:
     """
 

fmtr/tools/version

@@ -1 +1 @@
-1.0.11
+1.0.12