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Mastering Python: Closures and Decorators
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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

Challenge: Device Boots Count

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

¿Todo estuvo claro?

Sección 1. Capítulo 5
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Challenge: Device Boots Count

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

¿Todo estuvo claro?

Sección 1. Capítulo 5
toggle bottom row

Challenge: Device Boots Count

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

¿Todo estuvo claro?

Tarea

Imagine that you work in a company that produces devices. You have been tasked with developing a function that will count the number of boots on this device: with each boot, the device must increase the number of boots by 1.

  1. Define the boots variable in the global scope.
  2. Make changeable the boots global variable inside the boot() function local scope.
  3. Increase the boots variable by 1 inside the boot() function.
  4. If the device is booting for the first time, display a message:
    "The device boot for the first time".
  5. If the device is booting 2+ times, display a message: "The device boot N times", where N is a boots variable.

Sección 1. Capítulo 5
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