Package basics :: Module strings

Module strings

source code

Many operations on Python strings use the same syntax and operators as lists. The Pythonic conception is that both belong to a 'super' data type, sequences.

>>> X = 'dogs'
>>> Y = 'd'

There is an empty string, just as there is an empty list:

>>> Z = ''

>>> L = str(1)

L is no longer an int!

>>> L
'1'
>>> I = int(str(1))
>>> I
1
>>> M = str()
>>> M
''

>>> X[0]   
'd'
>>> X[1]   
'o'
>>> X[-1]  
's'
>>> X[0:2] 
'do'
>>> X[:-1] 
'dog'

The following raises an IndexError

>>> X[4]  
...
IndexError: list index out of range
>>> X + Y 
'dogsd'

There is one thing that can be done with lists that canNOT be done with strings. Assignment of values:

>>> 'spin'[2]= 'a'
...
TypeError: object does not support item assignment

demo_lists()

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