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Python%20Interview%20Questions%20and%20Answers

Question: How do I modify a string in place?
Answer:

You can't, because strings are immutable. If you need an object with this ability, try converting the string to a list or use the array module:

>>> s = "Hello, world" >>> a = list(s) 
>>>print a
['H', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd']

>>> a[7:] = list("there!") 
>>>''.join(a)
'Hello, there!' 

>>> import array 
>>> a = array.array('c', s) >>> print a
array('c', 'Hello, world')

>>> a[0] = 'y' ; print a
array('c', 'yello world')
>>> a.tostring()
'yello, world'

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