How do I iterate through the alphabet?

问题

In Python, could I simply ++ a char? What is an efficient way of doing this?

I want to iterate through URLs that have the www.website.com/term/#, www.website.com/term/a, www.website.com/term/b, www.website.com/term/c, www.website.com/term/d ... www.website.com/term/z format.

回答1:

You can use string.ascii_lowercase which is simply a convenience string of lowercase letters,

>>> from string import ascii_lowercase
>>> for c in ascii_lowercase:
...     # append to your url

回答2:

In addition to string.ascii_lowercase you should also take a look at the ord and chr built-ins. ord('a') will give you the ascii value for 'a' and chr(ord('a')) will give you back the string 'a'.

Using these you can increment and decrement through character codes and convert back and forth easily enough. ASCII table is always a good bookmark to have too.

来源：https://stackoverflow.com/questions/17182656/how-do-i-iterate-through-the-alphabet