Python: Nicest way to pad zeroes to string

What is the nicest/shortest way to pad a string with zeroes to the left, so the string length has a specific length?

From stackoverflow

• For numbers:

  print "%05d" % number
  

  See also: Python: String formatting.

  EDIT: It's worth noting that as of yesterday, this method of formatting is deprecated in favour of the format string method:

  print("{0:05d}".format(number)) # or
  print(format(number, "05d"))
  

  See PEP 3101 for details.

• Strings:

  >>> n = '4'
  >>> print n.zfill(3)
  >>> '004'
  

  And for numbers:

  >>> n = 4
  >>> print '%03d' % n
  >>> '004'
  

• width = 10
  x = 5
  print "%0*d" % (width, x)
  > 0000000005
  

  See the print documentation for all the exciting details!

• Just use the rjust method of the string object.

  This example will make a string of 10 characters long, padding as necessary.

  >>> t = 'test'
  >>> t.rjust(10, '0')
  >>> '000000test'