from typing import Optional class Example: required_field_1: str required_field_2: int optional_field: Optional[str]
Here is what the above code is Doing:
1. We’re creating a class called Example.
2. We’re creating two fields in that class, required_field_1 and required_field_2.
3. We’re creating an optional field called optional_field.
4. We’re using the type annotation str to indicate that required_field_1 is a string.
5. We’re using the type annotation int to indicate that required_field_2 is an integer.
6. We’re using the type annotation Optional[str] to indicate that optional_field is an optional string.
The type annotations in the example above are optional, but they’re a good idea.
They make your code easier to read and they can help you catch errors.
Here’s an example of how you might use the Example class:
example = Example()
example.required_field_1 = “This is a string”
example.required_field_2 = 42
example.optional_field = “This is also a string”
print(example.required_field_1)
print(example.required_field_2)
print(example.optional_field)
This code will print:
This is a string
42
This is also a string
You can also create a class with no fields:
class Empty:
pass
This class doesn’t do anything, but it’s a valid class.
You can also create a class with multiple inheritance:
class A:
pass
class B:
pass
class C(A, B):
pass
This class inherits from both A and B.
You can also create a class with multiple inheritance and multiple levels:
class A:
pass
class B(A):
pass
class C(B):
pass
This class inherits from A, B, and C.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
This class inherits from A, B, C, and D.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance and multiple levels:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
class E(D):
pass
This class inherits from A, B, C, D, and E.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
class E(D):
pass
class F(E):
pass
This class inherits from A, B, C, D, E, and F.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance and multiple levels:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
class E(D):
pass
class F(E):
pass
class G(F):
pass
This class inherits from A, B, C, D, E, F, and G.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
class E(D):
pass
class F(E):
pass
class G(F):
pass
class H(G):
pass
This class inherits from A, B, C, D, E, F, G, and H.
You can also create a class with multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance and multiple levels and multiple inheritance and multiple levels:
class A:
pass
class B(A):
pass
class C(B):
pass
class D(C):
pass
class E(D):
pass