Iterating over a String (Python)

In C++, I could do:

for(int i = 0; i < str.length(); ++i)
    std::cout << str[i] << std::endl;

How do I iterate over a string in Python?

From stackoverflow

• even easier:

  for c in "test":
      print c
  

  :-)

  hasen j : AFter a while of python-ing, I'm really hating C++ (I'm stuck with it for a current university course!)

  zgoda : Smart-and-to-the-point answer. :)

• As Johannes pointed out,

  for c in "string":
      #do something with c
  

  You can iterate pretty much anything in python using the for loop construct,

  for example, open("file.txt") returns a file object (and opens the file), iterating over it iterates over lines in that file

  for line in open(filename):
      # do something with line
  

  If that seems like magic, well it kinda is, but the idea behind it is really simple.

  There's a simple iterator protocol that can be applied to any kind of object to make the for loop work on it.

  Simply implement an iterator that defines a next() method, and implement an __iter__ method on a class to make it iterable. (the __iter__ of course, should return an iterator object, that is, an object that defines next())

  See official documentation

• Strings are just "sequences" in python and, as such, can be iterated in loops, as Johannes pointed out.

• Just to make a more comprehensive answer, the C way of iterating over a string can apply in Python, if you really wanna force a square peg into a round hole.

  i = 0
  while i < len(str):
      print str[i]
      i += 1
  

  But then again, why do that when strings are inherently iterable?

  for i in str:
      print i