new dir for py files

howtos_as_py_files/os_shutil_fileops.py

@@ -0,0 +1,22 @@
+# sr 11/19/2013
+# common file operations in os and shutil modules
+
+import shutil
+import os
+ 
+# Getting files of particular type from directory
+files = [f for f in os.listdir(s_pdb_dir) if f.endswith(".txt")]
+  
+# Copy and move
+shutil.copyfile("/path/to/file", "/path/to/new/file") 
+shutil.copy("/path/to/file", "/path/to/directory")
+shutil.move("/path/to/file","/path/to/directory")
+   
+# Check if file or directory exists
+os.path.exists("file or directory")
+os.path.isfile("file")
+os.path.isdir("directory")
+    
+# Working directory and absolute path to files
+os.getcwd()
+os.path.abspath("file")