old_contents: #!/usr/bin/python2
  # -*- coding: UTF-8 -*-
  
  # install
  # sudo pip install pymongo
  # sudo pip install MySQL-python
  # sudo install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib /Library/Python/2.7/site-packages/_mysql.so
  # sudo pip install requests
  
  # command
  python -V
  
  # script
  for letter in 'Python':
     print 'current letter:', letter
  
  fruits = ['banana', 'apple',  'mango']
  for index in range(len(fruits)):
     print 'current fruit:', fruits[index]
  
new_contents: #!/usr/bin/python2
  # -*- coding: UTF-8 -*-
  
  # install
  # sudo pip install pymongo
  # sudo pip install MySQL-python
  # sudo install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib /Library/Python/2.7/site-packages/_mysql.so
  # sudo pip install requests
  # sudo pip install threadpool
  # sudo pip install apscheduler
  
  # command
  python -V
  
  # script
  for letter in 'Python':
     print 'current letter:', letter
  
  fruits = ['banana', 'apple',  'mango']
  for index in range(len(fruits)):
     print 'current fruit:', fruits[index]
  
subject: add python2 script