old_contents: #!/usr/bin/python -e
  # -*- encoding: utf-8 -*-
  #
  # Copyright (c) 2013 ASMlover. All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  #
  #  * Redistributions of source code must retain the above copyright
  #    notice, this list ofconditions and the following disclaimer.
  #
  #  * Redistributions in binary form must reproduce the above copyright
  #    notice, this list of conditions and the following disclaimer in
  #    the documentation and/or other materialsprovided with the
  #    distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  
  class Vector(object):
    """ Vector of mini-stl """
    def __init__(self):
      self.elems_ = []
      self.size_ = 0
  
    def __del__(self):
      self.elems_ = []
      self.size_ = 0
  
    def clear(self):
      self.elems_ = []
  
    def empty(self):
      return 0 == self.size_
  
    def size(self):
      return self.size_
  
    def push_back(self, v):
      self.elems_.append(v)
      self.size_ += 1
  
    def pop_back(self):
      if self.size_ != 0:
        del self.elems_[self.size_ - 1]
        self.size_ -= 1
    
    def __getitem__(self, i):
      assert i >= 0 and i < self.size_
      return self.elems_[i]
  
    def __setitem__(self, i, v):
      assert i >= 0 and i < self.size_
      self.elems_[i] = v 
  
    def front(self):
      assert self.size_ > 0
      return self.elems_[0]
  
    def back(self):
      assert self.size_ > 0
      return self.elems_[self.size_ - 1] 
  
    def for_each(self, visit):
      assert visit
      for e in self.elems_:
        visit(e)
  
new_contents: #!/usr/bin/python -e
  # -*- encoding: utf-8 -*-
  #
  # Copyright (c) 2013 ASMlover. All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  #
  #  * Redistributions of source code must retain the above copyright
  #    notice, this list ofconditions and the following disclaimer.
  #
  #  * Redistributions in binary form must reproduce the above copyright
  #    notice, this list of conditions and the following disclaimer in
  #    the documentation and/or other materialsprovided with the
  #    distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  # POSSIBILITY OF SUCH DAMAGE.
  
  class Vector(object):
    """ Vector of mini-stl """
    def __init__(self):
      self.elems_ = []
      self.size_ = 0
      self.it = -1
  
    def __del__(self):
      self.elems_ = []
      self.size_ = 0 
    
    def __iter__(self):
      return self
  
    def next(self):
      self.it += 1
      if self.it == self.size_:
        raise StopIteration
      else:
        return self.elems_[self.it]
  
    def clear(self):
      self.elems_ = []
  
    def empty(self):
      return 0 == self.size_
  
    def size(self):
      return self.size_
  
    def push_back(self, v):
      self.elems_.append(v)
      self.size_ += 1
  
    def pop_back(self):
      if self.size_ != 0:
        del self.elems_[self.size_ - 1]
        self.size_ -= 1
    
    def __getitem__(self, i):
      assert i >= 0 and i < self.size_
      return self.elems_[i]
  
    def __setitem__(self, i, v):
      assert i >= 0 and i < self.size_
      self.elems_[i] = v 
  
    def front(self):
      assert self.size_ > 0
      return self.elems_[0]
  
    def back(self):
      assert self.size_ > 0
      return self.elems_[self.size_ - 1] 
  
    def for_each(self, visit):
      assert visit
      for e in self.elems_:
        visit(e)
  
subject: add iteration for Vector of mini-stl by using Python