strutil: Add 'nym' function

Helper function for dealing with names while avoiding pesky
things like quoting, spaces, and case sensitivity

tests/test_strutil.py

@@ -1,6 +1,6 @@
 import unittest
 
-from toolchest.strutil import list_or_splitstr
+from toolchest.strutil import list_or_splitstr, nym
 
 
 class test_list_or_splitstr(unittest.TestCase):
@@ -23,3 +23,15 @@ def test_normal(self):
         self.assertEqual(list_or_splitstr('''a
     b        c'''), ['a', 'b', 'c'])
         self.assertEqual(list_or_splitstr('a	b	c'), ['a', 'b', 'c'])
+
+
+class test_nym(unittest.TestCase):
+
+    def test_identity(self):
+        self.assertEqual(nym('abc'), 'abc')
+
+    def test_spaces(self):
+        self.assertEqual(nym('abc def'), 'abc_def')
+
+    def test_lowercase(self):
+        self.assertEqual(nym('aBcDeF'), 'abcdef')

toolchest/strutil.py

@@ -30,3 +30,9 @@ def regex_match(pattern, arg):
     if re.match(pattern, arg) is not None:
         return True
     return False
+
+
+def nym(arg):
+    ret = arg.lower().replace(' ', '_')
+    ret.replace('\t', '_')
+    return ret