Tuples.pptx
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This document provides an overview of tuples in Python. It defines tuples as immutable sequences that are created using parentheses, and can contain heterogeneous data types. It notes that tuples can be used as keys in dictionaries since they are immutable. The document discusses how to create, access, change, delete, and test membership of tuples. It also compares tuples to lists, noting that tuples use less memory than lists since their elements cannot be changed.
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By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
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Tuples.pptx
- 1. DISCOVER . LEARN . EMPOWER PYTHON BASICS UNIVERSITY INSTITUTE OF ENGINEERING DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING Programming in Python
- 2. Tuple 2
- 3. Tuple • Tuples are very similar to lists, except that they are immutable (they cannot be changed). They are created using parentheses, rather than square brackets. • We generally use tuple for heterogeneous (different) datatypes and list for homogeneous (similar) datatypes. • Since tuple are immutable, iterating through tuple is faster than with list. So there is a slight performance boost. • Tuples that contain immutable elements can be used as • key for a dictionary. With list, this is not possible. • If you have data that doesn't change, implementing it as tuple will guarantee that it remains write-protected. 3
- 4. Creating a Tuple • A tuple is created by placing all the items(elements) inside a parentheses (), separated by comma. • Theparenthesesareoptional but isa goodpracticeto write it. • Atuple canhaveanynumberof items and they may be of different types (integer,float, list,stringetc.). 4
- 5. Creating a Tuple • Creatingatuple with oneelementisabit tricky. Havingone element within parenthesesis not enough. We will needatrailingcomma to indicatethat it isin factatuple. 5
- 6. Accessing Elements in a Tuple • You can access the values in the tuple with their index, just as you did with lists: • Nested tuple are accessed using nested indexing • Negative indexing can be applied to tuples similar to lists. • We can access a range of items in a tuple by using the slicing operator • Trying to reassign a value in a tuple causes a TypeError. 6
- 7. Changing A Tuple 7 • Unlike lists, tuples are immutable. • This means that elements of a tuple cannot be changed once it has been assigned. But, if the element is itself a mutable datatype like list, its nested items can be changed.
- 8. Changing a Tuple 8 Similar to List, • We can use + operator to combine two tuples. This is also called concatenation. • We can also repeat the elements in a tuple for a given number of times using the * operator. • Both + and * operations result into a new tuple.
- 9. Deleting a Tuple 9 • We cannot change the elements in a tuple. That also meanswe cannot delete or remove items from a tuple. • But deleting a tuple entirely is possible using the keyword del.
- 10. Tuple Methods 10 • Methods that add items or remove items are not available withtuple. Only the following two methods are available.
- 11. Tuple Membership Test 11 • Wecan testifanitemexistsinatupleornot, usingthe keywordin.