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Python Lambda expressions: Make code more readable

Feb 19, 2024 pm 06:03 PM
python anonymous function readability

Python Lambda表达式:让代码更具可读性

Lambda expression is a simplified anonymous function that allows you to write code in a cleaner and more readable way. It is often used to simplify code and reduce duplication. A lambda expression consists of the keyword lambda and a colon, followed by a set of parameters and an expression. For example:

lambda x: x + 1
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This Lambda expression accepts a parameter x and returns the value of x plus 1.

Lambda expressions can be used in a variety of situations, including:

  • As function parameters: You can pass Lambda expressions as function parameters. For example:
def apply_function(function, numbers):
return [function(number) for number in numbers]

result = apply_function(lambda x: x + 1, [1, 2, 3])
print(result)# [2, 3, 4]
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  • As a list comprehension: You can use Lambda expressions as a list comprehension. For example:
numbers = [1, 2, 3, 4, 5]
result = [number + 1 for number in numbers]
print(result)# [2, 3, 4, 5, 6]
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  • As a generator expression: You can use a Lambda expression as a generator expression. For example:
numbers = (number + 1 for number in range(5))
for number in numbers:
print(number)# 1 2 3 4 5
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  • Parsing as a dictionary: You can use Lambda expressions to parse as a dictionary. For example:
names = ["John", "Mary", "Bob"]
ages = [20, 25, 30]
result = {name: age for name, age in zip(names, ages)}
print(result)# {"John": 20, "Mary": 25, "Bob": 30}
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Lambda expressions are a powerful tool in python that can make your code more readable and concise. By understanding the use of lambda expressions, you can write clearer, more maintainable code.

In short, Lambda expressions are a very useful feature in Python that can help you write cleaner and more readable code. If you haven't used Lambda expressions yet, I highly recommend youLearnand start using it.

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