Cara memeriksa kelas suatu objek dengan python

Untuk mengakses classname dari tipe objek, gunakan atribut __name__

Cara mendapatkan nama kelas dengan Python

Untuk mendapatkan nama kelas dari sebuah instance dengan Python

1. Gunakan fungsi type() dan __name__ untuk mendapatkan tipe atau kelas dari Object/Instance
2. Menggunakan kombinasi __class__ dan __name__ untuk mendapatkan tipe atau kelas dari Object/Instance

Fungsi type() digunakan untuk mendapatkan tipe data dari objek Python

Contoh

Mari kita ambil contoh string sederhana dan periksa nama kelasnya

data = "Playstation 5"

print(type(data).__name__)

Keluaran

str

Seperti yang Anda lihat, kelas instance string adalah str

Mari gunakan modul itertools, gunakan instance pengulangannya, dan dapatkan nama kelasnya

import itertools

data = itertools.repeat(1)

print(type(data).__name__)

Keluaran

repeat

Mari kita tentukan daftar kosong dan temukan kelas instance daftar

a_list = []

data_type = type(a_list)

class_name = data_type.__name__

print(class_name)

Keluaran

list

Jika Anda menggunakan Python 2. x, sintaks berikut akan bekerja untuk Anda

data.__class__.__name__

Anda juga bisa mendapatkan nama kelas sebagai string

class K:
    pass


k = K()
print(str(k.__class__))

Keluaran

<class '__main__.K'>

Itu saja untuk tutorial ini

Fungsi

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Misalnya,

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Juga, Selesaikan. Latihan Dasar Python dan Kuis Pemula

Daftar isi

Cara Menggunakan Fungsi isinstance() dengan Python

Mari kita lihat sintaksnya terlebih dahulu sebelum beralih ke contoh

Sintaksis

isinstance(object, classinfo)

• Dibutuhkan dua argumen, dan keduanya wajib
• Fungsi

  num = 90
  result = isinstance(num, int)
  if result:
      print("Yes")
  else:
      print("No")

  2 memeriksa apakah argumen

  num = 90
  result = isinstance(num, int)
  if result:
      print("Yes")
  else:
      print("No")

  7 adalah turunan atau subkelas dari argumen kelas

  num = 90
  result = isinstance(num, int)
  if result:
      print("Yes")
  else:
      print("No")

  8

Dengan menggunakan fungsi

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

1. Lewati objek ke isinstance()

   Berikan variabel yang ingin Anda periksa sebagai

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   _7 argumen ke

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   2. Di sini objek dapat berupa objek kelas apa saja atau nama variabel apa pun

2. Tentukan nama Kelas atau Jenis sebagai argumen

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   8

   Misalnya,

   Yes

   _3 untuk memeriksa apakah

   Yes

   4 adalah turunan dari kelas

   Yes

   5
   

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   8 adalah nama jenis atau nama Kelas yang ingin Anda periksa terhadap variabel. Di sini Anda dapat menentukan nama tipe data atau Nama kelas
   Anda juga dapat melewatkan beberapa kelas/tipe dalam format Tuple. Misalnya, Anda dapat melewati

   Yes

   _5,

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   5,

   Yes

   9,

   # Check if 80 is an instance of class int
   number = 80
   print(isinstance(number, int))
   # output True
   
   print(isinstance(number, float))
   # output False
   
   pi = 3.14
   # Check 3.14 is an instance of class float
   print(isinstance(pi, float))
   # Output True
   
   # Check if (1 + 2j) is an instance of complex
   complex_num = 1 + 2j
   print(isinstance(complex_num, complex))
   # Output True
   
   # Check if 'PYnative' is an instance of class string
   name = "PYnative.com"
   print(isinstance(name, str))
   # Output True
   
   # Check if names is an instance of class list
   names = ["Eric", "Scott", "Kelly"]
   print(isinstance(names, list))
   # Output True
   
   # Check if student_report is an instance of class dict
   student_report = {"John": 80, "Eric": 70, "Donald": 90}
   print(isinstance(student_report, dict))
   # Output True
   
   # Check if names is an instance of class tuple
   names = ("Sam", "Kelly", 'Emma')
   print(isinstance(names, tuple))
   # Output True
   
   # Check if numbers is an instance of class tuple
   numbers = {11, 22, 33, 44, 55}
   print(isinstance(numbers, set))
   # Output True

   0, atau kelas yang dibuat pengguna

3. Jalankan operasi Anda, Jika hasilnya Benar

   num = 90
   result = isinstance(num, int)
   if result:
       print("Yes")
   else:
       print("No")

   2 mengembalikan True jika suatu objek atau variabel bertipe tertentu jika tidak False

Contoh

Menggunakan isintance() kita dapat memverifikasi apakah suatu variabel adalah angka atau string. Mari kita asumsikan variabel

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Keluaran

Yes

Seperti yang dapat kita lihat pada keluaran,

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

Catatan. Jika argumen

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

isinstance() Dengan Jenis Bawaan

Seperti yang Anda ketahui, Setiap nilai (variabel) di Python memiliki tipe. Dalam Python, kita dapat menggunakan berbagai tipe bawaan seperti

Yes

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

Catatan. Jika kita menggunakan

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

var = None
# empty but not None
s1 = ''
print(isinstance(var, float))
# Output False
print(isinstance(s1, str))
# Output True

var = None
# empty but not None
s1 = ''
print(isinstance(var, float))
# Output False
print(isinstance(s1, str))
# Output True

var = None
# empty but not None
s1 = ''
print(isinstance(var, float))
# Output False
print(isinstance(s1, str))
# Output True

isinstance() Dengan Beberapa Kelas

Anda juga dapat memeriksa instance dengan berbagai jenis. Katakanlah Anda memiliki variabel, dan Anda ingin memeriksa apakah variabel tersebut memiliki nilai numerik atau tidak, misalnya, nilai numerik dapat berupa

Yes

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

Untuk memverifikasi apakah suatu variabel adalah turunan dari salah satu tipe yang ditentukan, kita perlu menyebutkan semua tipe dalam sebuah tuple dan meneruskannya ke argumen classInfo dari

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Contoh

def check_number(var):
    if isinstance(var, (int, float)):
        print('variable', var, 'is instance of numeric type')
    else:
        print('variable', var, 'is not instance of numeric type')

num1 = 80
check_number(num1)
# Output variable 80 is instance of numeric type

num2 = 55.70
check_number(num2)
# Output variable 55.7 is instance of numeric type

num3 = '20'
check_number(num3)
# Output variable '20' is not instance of numeric type

isinstance() Dengan Kelas Python

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Anda dapat memverifikasi apakah objek

var = None
# empty but not None
s1 = ''
print(isinstance(var, float))
# Output False
print(isinstance(s1, str))
# Output True

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

class Employee:

    def __init__(self, name, salary):
        self.name = name
        self.salary = salary

class Person:

    def __init__(self, name, sex):
        self.name = name
        self.sex = sex

emp = Employee("Emma", 11000)
per = Person("Brent", "male")

# Checking if a emp object is an instance of Employee
print(isinstance(emp, Employee))
# Output True

# Checking if the per object is an instance of Employee
print(isinstance(per, Employee))
# Output False

fungsi isinstance() Dengan Warisan

Objek dari tipe subclass juga merupakan tipe dari parent class. Misalnya, Jika Mobil adalah subkelas dari Kendaraan, maka objek Mobil dapat dirujuk oleh Mobil atau Kendaraan. Dalam hal ini,

def check_number(var):
    if isinstance(var, (int, float)):
        print('variable', var, 'is instance of numeric type')
    else:
        print('variable', var, 'is not instance of numeric type')

num1 = 80
check_number(num1)
# Output variable 80 is instance of numeric type

num2 = 55.70
check_number(num2)
# Output variable 55.7 is instance of numeric type

num3 = '20'
check_number(num3)
# Output variable '20' is not instance of numeric type

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

Fungsi

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

def check_number(var):
    if isinstance(var, (int, float)):
        print('variable', var, 'is instance of numeric type')
    else:
        print('variable', var, 'is not instance of numeric type')

num1 = 80
check_number(num1)
# Output variable 80 is instance of numeric type

num2 = 55.70
check_number(num2)
# Output variable 55.7 is instance of numeric type

num3 = '20'
check_number(num3)
# Output variable '20' is not instance of numeric type

Untuk mendemonstrasikan ini, saya telah membuat dua kelas, Developer dan PythonDeveoper. Di sini PythonDeveoper adalah sub-kelas dari kelas Pengembang

class Developer(object):

    # Constructor
    def __init__(self, name):
        self.name = name

    def display(self):
        print("Developer:", self.name, "-")

class PythonDeveloper(Developer):

    # Constructor
    def __init__(self, name, language):
        self.name = name
        self.language = language

    def display(self):
        print("Python Developer:", self.name, "language:", self.language, "-")

# Object of PythonDeveloper
dev = PythonDeveloper("Eric", "Python")
# is PythonDeveloper object an instance of a PythonDeveloper Class
print(isinstance(dev, PythonDeveloper))
# Output True

# is python_dev object an instance of a Developer Class
print(isinstance(dev, Developer))
# Output True

Catatan. Fungsi

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

isinstance dengan daftar Python

Seperti yang Anda ketahui, daftar Python digunakan untuk menyimpan beberapa nilai sekaligus. Nilai-nilai ini dapat berupa tipe data apa pun seperti angka, string, atau objek Kelas apa pun

Pada bagian ini, kita akan menguji operasi berikut dengan daftar Python menggunakan fungsi

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

• Memeriksa apakah suatu objek bertipe ________21______9 dengan python
• Periksa apakah elemen daftar adalah daftar
• Verifikasi apakah elemen daftar adalah angka atau string
• Python memeriksa apakah semua elemen daftar adalah tipe yang sama

Memeriksa apakah suatu objek adalah turunan dari tipe daftar

sample_list = ["Emma", "Stevan", "Brent"]
res = isinstance(sample_list, list)
print(sample_list, 'is instance of list?', res)

# Output 'Emma', 'Stevan', 'Brent'] is instance of list? True

Periksa apakah elemen daftar adalah daftar bersarang

Untuk memeriksa apakah salah satu elemen dalam daftar itu sendiri adalah sebuah daftar. Misalnya, Anda memiliki daftar berikut, Gunakan

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

sampleList = ['Emma', 'Stevan', ['Jordan', 'Donald', 'Sam']]

Ulangi daftar dan verifikasi setiap kelas elemen, dan jika itu adalah tipe daftar, kita dapat mengatakan bahwa daftar tersebut berisi daftar bersarang

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Periksa apakah elemen daftar adalah angka atau string

Periksa jenis setiap elemen dengan beberapa jenis numerik seperti

Yes

# Check if 80 is an instance of class int
number = 80
print(isinstance(number, int))
# output True

print(isinstance(number, float))
# output False

pi = 3.14
# Check 3.14 is an instance of class float
print(isinstance(pi, float))
# Output True

# Check if (1 + 2j) is an instance of complex
complex_num = 1 + 2j
print(isinstance(complex_num, complex))
# Output True

# Check if 'PYnative' is an instance of class string
name = "PYnative.com"
print(isinstance(name, str))
# Output True

# Check if names is an instance of class list
names = ["Eric", "Scott", "Kelly"]
print(isinstance(names, list))
# Output True

# Check if student_report is an instance of class dict
student_report = {"John": 80, "Eric": 70, "Donald": 90}
print(isinstance(student_report, dict))
# Output True

# Check if names is an instance of class tuple
names = ("Sam", "Kelly", 'Emma')
print(isinstance(names, tuple))
# Output True

# Check if numbers is an instance of class tuple
numbers = {11, 22, 33, 44, 55}
print(isinstance(numbers, set))
# Output True

class Employee:

    def __init__(self, name, salary):
        self.name = name
        self.salary = salary

class Person:

    def __init__(self, name, sex):
        self.name = name
        self.sex = sex

emp = Employee("Emma", 11000)
per = Person("Brent", "male")

# Checking if a emp object is an instance of Employee
print(isinstance(emp, Employee))
# Output True

# Checking if the per object is an instance of Employee
print(isinstance(per, Employee))
# Output False

num = 90
result = isinstance(num, int)
if result:
    print("Yes")
else:
    print("No")

Apa kelas objek di Python?

Apa itu __ kelas __ dengan Python?

Bagaimana Anda memeriksa apakah suatu objek ada di Python?