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Python Tutorial
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Understanding Variables in PythonUnderstanding Variables in Python
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Types Of Operators in PythonTypes Of Operators in Python
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How to create string ?How to create string ?
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Data Structure in PythonData Structure in Python
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What is a Function in PythonWhat is a Function in Python
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Parameters and Arguments in PythonParameters and Arguments in Python
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What is a Lambda FunctionWhat is a Lambda Function
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What is a Regular Expression?What is a Regular Expression?
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Introduction to Loops in PythonIntroduction to Loops in Python
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If-else Statements in PythonIf-else Statements in Python
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Break Statement in PythonBreak Statement in Python
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OOPS in PythonOOPS in Python
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Space and Time in PythonSpace and Time in Python
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Data Type in PythonData Type in Python
Anonymous Functions (Lambda Functions)
1.1 What is a Lambda Function?
A lambda function is a small, one-line function that doesn’t need a name. It’s useful for quick,
simple operations.
* syntax lambda arguments: expression
Suppose you want to sort a list of tuples based on the second item in each tuple:
# List of tuples
data = [(1, ‘apple’), (2, ‘banana’), (3, ‘cherry’), (4, ‘date’)]
# Sort the list of tuples by the second item in each tuple using a lambda␣
↪function
sorted_data = sorted(data, key=lambda x: x[1])
print(sorted_data)
[(1, ‘apple’), (2, ‘banana’), (3, ‘cherry’), (4, ‘date’)]
• sorted() is used to sort the list.
• key=lambda x: x[1] specifies that the sorting should be based on the second item in each
tuple (the fruit name).
• lambda x: x[1] is a lambda function that takes a tuple x and returns the second element of
that tuple (x[1]).
