Please tell me how to eterate the string

As with other iterations, such as lists and tuples, strings can be translated in the following ways:

for c in "string":
    #What kind of chords?

An object that can be interpreted in Python has the __iter__ attribute in the object. So, to determine which object is of type itable, check if the object has hasattr(someOBJ.__iter__) In fact, Python's repeat statements can translate almost any type (the object has __iter__ attributes). For example, you can eterate a file object to read the contents of the file.

filename = open("file.txt")
for line in open(filename):
    print line