What is the simplest way to swap each pair of adjoining chars in a string with Python?

Question

I want to swap each pair of characters in a string. \'2143\' becomes \'1234\', \'badcfe\' becomes \'abcdef\'.

How

Answer 1

There is no need to make a list. The following works for even-length strings:

r = ''
for in in range(0, len(s), 2) :
  r += s[i + 1] + s[i]
s = r