Fixes #41 (#72)

* Fixes #41

* Added doc string and code changes

* Addressing changes

;
q'

* Correcting spelling

.travis.yml

@@ -8,6 +8,7 @@ python:
 
 # command to install dependencies
 install: pip install -U pytest
+install: pip install -U autopep8
 
 # command to run tests
-script: py.test
+script: py.test

setup.py

@@ -8,4 +8,5 @@
       license='BSD',
       packages=['pydsa'],
       zip_safe=False,
+      install_requires=['autopep8'],
       )

white_space.py

@@ -0,0 +1,50 @@
+# !/usr/bin/env python
+'''
+This module automatically checks for pep8 format.
+It scans the complete folder, searches for python files
+(ignoring the virtual environment python files) and automatially
+format it according to pep8 format using a python plugin 'autopep8'.
+'''
+
+import os
+import autopep8
+import sys
+
+
+BASE_DIR = os.path.abspath(__file__)
+
+
+def format_file(path):
+    '''
+    The function, using 'for' loop scans all the directories as well
+    as sub-directories of the folder for python file and checks
+    for pep8 format.
+    '''
+    p = ""
+    for dirpath, _, filenames in os.walk(path):
+        if(os.path.exists(os.path.join(dirpath, 'bin/activate'))):
+            p = dirpath
+        for f in filenames:
+            if f.endswith('.py'):
+                filename = os.path.abspath(os.path.join(dirpath, f))
+                if (not bool(p)):
+                    if os.access(filename, os.W_OK):
+                        try:
+                            file1 = open(filename, 'r')
+                            source_code = file1.read()
+                            file1.seek(0)
+                            file1 = open(filename, 'w')
+                            file1.truncate()
+                            file1.write(autopep8.fix_code(source_code))
+                            file1.close()
+                        except:
+                            print(filename)
+                            print(sys.exc_info()[0])
+
+
+if __name__ == "__main__":
+    path_of_dir = [
+        os.path.dirname(BASE_DIR),
+    ]
+    for x in path_of_dir:
+        format_file(x)