Introduction to advanced features and usage of python
[Guide] Python is a beautiful language, it's easy to use but very powerful. The advanced features of any programming language are usually discovered through a lot of experience. For example, you are writing a complex project and looking for the answer to a certain question on stackoverflow, and then you suddenly find a very elegant solution that uses Python features you never know. Let’s give you the python Introduction to advanced features and usage.
1. Map function
Map() is a built-in Python function that can apply functions to elements in various data structures, such as lists or dictionaries. For this kind of operation, this is a very clean and readable way of execution.
2. Lambda function
Lambda function is a relatively small anonymous function-anonymous means that it actually has no function name.
Python functions are usually defined in the def a_function_name() style, but for lambda functions, we don't name them at all. This is because the function of the lambda function is to perform some simple expression or operation without the need to fully define the function.
The lambda function can use any number of parameters, but the expression can only have one.
3. Generator function
The Generator function is an iterator-like function, that is, it can also be used in a for loop statement. This greatly simplifies your code, and it saves a lot of memory compared to a simple for loop.
4. Filter function
The filter built-in function is very similar to the map function. It also applies functions to sequence structures (lists, tuples, dictionaries). The key difference between the two is that filter() will only return elements for which the applied function returns True.
5. Itertools module
Python's Itertools module is a collection of tools for processing iterators. Iterator is a data type that can be used in for loop statements (including lists, tuples, and dictionaries).
Using the functions in the Itertools module allows you to perform many iterator operations, which usually require multi-line functions and complex list comprehensions.
The above is an introduction to the advanced features and usage of python. I hope it will be helpful to everyone's python learning. If you want to learn more advanced python skills, I hope you will continue to pay attention!