Context Managers
Lesson 1 of 1
  1. 1
    Introduction to Resource Management
    When we use a computer, we tend to interact with its various resources. Similar to how we need to manage resources in our daily lives like our time and energy, resources on a computer also need to…
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  2. 2
    A Familiar Face: The with Statement
    One of the most common ways to manage resources in Python is to make sure the files we use in our scripts are properly closed after use. We already explored this concept when we used the with sta…
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  3. 3
    Class Based Context Managers
    Now that we have an understanding of why we need context managers and the power of the with statement, it is essential for us to know what’s happening under the hood to gain a much deeper understan…
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  4. 4
    Class Based Context Managers II
    Now that we know the structure of implementing our own class-based context manager. Let’s walk through a context manager that manages actual files as well as explore each of the methods we saw earl…
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  5. 5
    Handling Exceptions I
    Remember this? def exit(self, *exc): It’s time to address the big mystery. What in the world is the *exc parameter in the exit method we have been writing so far? Well, context manager…
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  6. 6
    Handling Exceptions II
    Printing exceptions isn’t the only way we can handle them in the exit method. An exception that occurs in a context manager can be handled in two ways: - If we want to throw an error when an …
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  7. 7
    Introduction to Contextlib
    We’ve learned that we can create our own context managers using the class-based method, but there’s an even simpler way of creating context managers. We can use a built-in Python module called cont…
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  8. 8
    Contextlib Error Handling
    In the previous exercise, we explored how to create a context manager using the contextlib module. However, we did not go over how to deal with errors just as we did with the class-based approach. …
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  9. 9
    Nested Context Managers
    So far, we’ve only been using context managers within the context (Ha! Get it?) of one file. In most programs, there might be a need to use context managers for a couple of different scenarios that…
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  10. 10
    Review
    Congratulations! We have reached the end of the context managers lesson. Making it this far means that we have explored many of the core concepts behind context managers. Let’s recap: **Context M…
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