Python Basics-tuples

Meta-group

A python tuple is similar to a list, except that the elements of a tuple cannot be modified. Tuples use parentheses, and the list uses square brackets.

atuple= ('hello', 77,99,18.6)print(atuple)

<1> Access tuples

atuple= ('hello', 77,99,18.6)print(atuple)Print  (atuple[0])print(atuple[3])

Execution Result:

<2> Modifying tuples

Note: Changes to the tuple's data are not allowed in Python, including elements that cannot be deleted.

<3> Tuple's built-in function count, index

Index and Count are the same as in string and list usage

>>> A = (' A ',' B ',' C ',' A ',>>> a.index ( ' a ', 1, 3) # note is left closed right open interval traceback (most recent call last): File " <stdin> ", line 1, in <module> ValueError:tuple.index (x): x not in tuple>>> a.index ( ' a ', 1, 4) 3>>> a.count ( ' B ') 2>>> a.count ( ' d ') 0              

Python Basics-tuples