Untuk apa getattr() digunakan dalam python mcq

Table of Contents Show

Bagaimana getattr() bekerja dengan Python
Contoh 1. Mendemonstrasikan cara kerja getattr()
Contoh 2. getattr() ketika atribut bernama tidak ditemukan
Contoh 3. Analisis Kinerja dan getattr python dengan parameter
Contoh 4. getattr nilai default Python
Contoh 5. Pemanggilan fungsi python getattr()
Untuk apa Getattr () digunakan ?*?
Apa Getattr () digunakan untuk mengakses atribut objek B untuk menghapus atribut?
Apa Getattr () Digunakan untuk 1 poin untuk mengakses atribut objek untuk menghapus atribut untuk memeriksa apakah atribut ada atau tidak untuk menetapkan atribut?
Apa metode init di kelas Python Mcq?

Fungsi python getattr()

Fungsi getattr() di Python menampilkan nilai atribut bernama untuk objek yang diberikan

Sintaksis

getattr(object, name[, default])

Parameter

obyek. Ini adalah parameter yang diperlukan yang mewakili objek

nama. Parameter ini mewakili nama atribut yang ingin Anda dapatkan nilainya

bawaan. Ini mewakili nilai yang akan dikembalikan jika atribut tidak ada

Kembali

Fungsi ini mengembalikan nilai atribut yang diberikan dari objek yang ditentukan

Contoh 1

# Python program explaining
# the getattr() function
# declaring a class 
class EAT :
    name = "ExamplesAndTutorials"
    acive_years = 14
# initializing the object
obj = EAT()
# using getattr() function
print("The name is " + getattr(obj,'name'))

Keluaran

The name is ExamplesAndTutorials

Fungsi python getattr() digunakan untuk mengakses nilai atribut suatu objek dan juga memberikan opsi untuk mengeksekusi nilai default jika kunci tidak tersedia

Sintaksis. getattr(obj, kunci, def)
Parameter.
obj. Objek yang atributnya perlu diproses
kunci. Atribut objek
def. Nilai default yang perlu dicetak jika atribut case tidak ditemukan
Pengembalian. Nilai objek jika nilai tersedia, nilai default jika atribut tidak ada
dan mengembalikan AttributeError jika atribut tidak ada dan nilai default tidak ada
ditentukan.

Bagaimana getattr() bekerja dengan Python

Contoh 1. Mendemonstrasikan cara kerja getattr()

Python3

# Python code to demonstrate

# working of getattr()

# declaring class

class

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

________13______1

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

8 ________13______9

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'motto'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

<__main__.GfG object at 0x0000023C1ED92748>
<class '__main__.GfG'>
<bound method GfG.call of <__main__.GfG object at 0x0000023C1ED92748>>
Vivek called with parameters 'arg'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

Keluaran.

The name is GeeksforGeeks
Description is CS Portal

Pengecualian.

AttributeError: GfG instance has no attribute 'motto'

Contoh 2. getattr() ketika atribut bernama tidak ditemukan

Python3

# Python code to demonstrate

# working of getattr()

# declaring class

class

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

# Python code to demonstrate_8

________13______1

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

6# working of getattr()5

AttributeError: 'GfG' object has no attribute 'gender'

8 ________13

AttributeError: GfG instance has no attribute 'motto'

_23_______0# working of getattr()9

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

Keluaran

AttributeError: 'GfG' object has no attribute 'gender'

Contoh 3. Analisis Kinerja dan getattr python dengan parameter

Python3

# Python code to demonstrate

# declaring class_2

# declaring class3 # declaring class4

# declaring class

class

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

# Python code to demonstrate_8

________13______1

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

_00

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

_20

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

Keluaran.

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

Contoh 4. getattr nilai default Python

Python3

# Python code to demonstrate

# working of getattr()

# declaring class

class

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

# Python code to demonstrate_8

________13______1

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

<__main__.GfG object at 0x0000023C1ED92748>
<class '__main__.GfG'>
<bound method GfG.call of <__main__.GfG object at 0x0000023C1ED92748>>
Vivek called with parameters 'arg'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

Keluaran

AttributeError: 'GfG' object has no attribute 'motto'

Contoh 5. Pemanggilan fungsi python getattr()

Python3

# Python code to demonstrate

# working of getattr()

# declaring class

class

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

92________3______93

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

# Python code to demonstrate_8

________13______1

AttributeError: GfG instance has no attribute 'motto'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

The name is GeeksforGeeks
Time to execute getattr 5.0067901611328125e-06
The name is GeeksforGeeks
Time to execute conventional method 1.1920928955078125e-06

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: 'GfG' object has no attribute 'gender'

AttributeError: GfG instance has no attribute 'motto'

Keluaran

<__main__.GfG object at 0x0000023C1ED92748>
<class '__main__.GfG'>
<bound method GfG.call of <__main__.GfG object at 0x0000023C1ED92748>>
Vivek called with parameters 'arg'

Hasil. Metode konvensional memakan waktu lebih sedikit daripada getattr(), tetapi ketika nilai default harus digunakan jika ada atribut yang hilang, getattr() adalah pilihan yang baik

Aplikasi. Ada banyak aplikasi getattr(), beberapa di antaranya telah disebutkan dalam kasus tidak adanya atribut objek, dalam pengembangan web di mana beberapa atribut bentuk bersifat opsional. Juga berguna dalam kasus pengumpulan fitur Pembelajaran Mesin jika beberapa fitur terkadang hilang dalam pengumpulan data

Untuk apa Getattr () digunakan ?*?

Fungsi getattr() mengembalikan nilai atribut yang ditentukan dari objek yang ditentukan .

Apa Getattr () digunakan untuk mengakses atribut objek B untuk menghapus atribut?

Fungsi Python getattr() digunakan untuk mengakses nilai atribut suatu objek dan juga memberikan opsi untuk mengeksekusi nilai default jika .

Apa Getattr () Digunakan untuk 1 poin untuk mengakses atribut objek untuk menghapus atribut untuk memeriksa apakah atribut ada atau tidak untuk menetapkan atribut?

Pada dasarnya, fungsi bawaan getattr() Python digunakan untuk mengambil nilai atribut objek dengan string nama . Jika atribut yang ditentukan ini tidak ada, maka nilai yang ditentukan sebagai argumen default ketiga opsional dikembalikan.