Added chapter_02_video_02 code.

Author: saberry

code/chapter_02_video_02.py

@@ -0,0 +1,10 @@
+import pandas as pd
+
+painful_strings = {'painful_strings':
+                   ['usePython', 'pandasForLife', 'Python is helpful']}
+
+long_strings = pd.DataFrame(data=painful_strings)
+
+long_strings['painful_strings'].str.replace(
+    pat='([a-z])([A-Z])',
+    repl='\\1 \\2')