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Please enable JavaScript in your browser settings or update your browser.Challenge: Text Cache | Closure
Mastering Python: Closures and Decorators
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Course Content

Mastering Python: Closures and Decorators

Mastering Python: Closures and Decorators

1. Scopes
What are scopes?Built-In and Global ScopesLocal ScopeNon-local ScopeChallenge: Device Boots Count
2. Closure
What is Closure?Implementation of ClosureClosure with ArgumentsChallenge: Text Cache
3. Decorators
What are Decorators?Decorator UsageFlexible DecoratorsChallenge: Type Validation DecoratorDecorator with ParametersChallenge: Flexible Type Validation Decorator

bookChallenge: Text Cache

Task
test

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Implement the string_cache() function that returns the inner() function that takes the string value and adds it to the enclosed text.

  1. Create the text variable with the value "" (empty string) in the string_cache() function.
  2. The inner() function should take the string argument with the default value "".
  3. Make the text non-local variable changeable inside the inner() function.
  4. If the string argument is not an empty string, add this string to the text non-local variable. After the first string addition, the addition should be with space.
  5. The inner() function should return the text enclosed variable.
  6. The string_cache() should return the inner() function without calling.
  7. Call the string_cache() function and assign the result to the text_cache variable.

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Section 2. Chapter 4
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bookChallenge: Text Cache

Task
test

Swipe to show code editor

Implement the string_cache() function that returns the inner() function that takes the string value and adds it to the enclosed text.

  1. Create the text variable with the value "" (empty string) in the string_cache() function.
  2. The inner() function should take the string argument with the default value "".
  3. Make the text non-local variable changeable inside the inner() function.
  4. If the string argument is not an empty string, add this string to the text non-local variable. After the first string addition, the addition should be with space.
  5. The inner() function should return the text enclosed variable.
  6. The string_cache() should return the inner() function without calling.
  7. Call the string_cache() function and assign the result to the text_cache variable.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 2. Chapter 4
toggle bottom row

bookChallenge: Text Cache

Task
test

Swipe to show code editor

Implement the string_cache() function that returns the inner() function that takes the string value and adds it to the enclosed text.

  1. Create the text variable with the value "" (empty string) in the string_cache() function.
  2. The inner() function should take the string argument with the default value "".
  3. Make the text non-local variable changeable inside the inner() function.
  4. If the string argument is not an empty string, add this string to the text non-local variable. After the first string addition, the addition should be with space.
  5. The inner() function should return the text enclosed variable.
  6. The string_cache() should return the inner() function without calling.
  7. Call the string_cache() function and assign the result to the text_cache variable.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Task
test

Swipe to show code editor

Implement the string_cache() function that returns the inner() function that takes the string value and adds it to the enclosed text.

  1. Create the text variable with the value "" (empty string) in the string_cache() function.
  2. The inner() function should take the string argument with the default value "".
  3. Make the text non-local variable changeable inside the inner() function.
  4. If the string argument is not an empty string, add this string to the text non-local variable. After the first string addition, the addition should be with space.
  5. The inner() function should return the text enclosed variable.
  6. The string_cache() should return the inner() function without calling.
  7. Call the string_cache() function and assign the result to the text_cache variable.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 2. Chapter 4
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