adii1823
78 lines
1.5 KiB
Python
78 lines
1.5 KiB
Python
# samples/typing.examples.py
|
|
|
|
|
|
###############################################
|
|
# This module is not supposed to be executed! #
|
|
###############################################
|
|
|
|
|
|
# not strongly typed language
|
|
a = 7
|
|
b = "7"
|
|
|
|
a + b == 14
|
|
concatenate(a, b) == "77"
|
|
|
|
|
|
# dynamic typing
|
|
a = 7
|
|
a * 2 == 14
|
|
a = "Hello"
|
|
a * 2 == "HelloHello"
|
|
|
|
|
|
# other languages
|
|
String greeting = "Hello";
|
|
int m = 7;
|
|
float pi = 3.141592;
|
|
|
|
|
|
# function annotations
|
|
def greet(first_name, last_name, age):
|
|
return f"Greeting {first_name} {last_name} of age {age}"
|
|
|
|
def greet(
|
|
first_name: "First name of the person we are greeting",
|
|
last_name: "Last name of the person we are greeting",
|
|
age: "The person's age"
|
|
) -> "Returns the greeting sentence":
|
|
return f"Greeting {first_name} {last_name} of age {age}"
|
|
|
|
def greet(first_name: str, last_name: str, age: int = 18) -> str:
|
|
return f"Greeting {first_name} {last_name} of age {age}"
|
|
|
|
|
|
# list
|
|
from typing import List
|
|
|
|
def process_words(words: List[str]):
|
|
for word in words:
|
|
# do something with word
|
|
|
|
|
|
# dict
|
|
from typing import Dict
|
|
|
|
def process_users(users: Dict[str, int]):
|
|
for name, age in users.items():
|
|
# do something with name and age
|
|
|
|
|
|
# optional
|
|
from typing import Optional
|
|
|
|
def greet_again(name: Optional[str] = None):
|
|
if name is not None:
|
|
print(f"Hello {name}!")
|
|
else:
|
|
print("Hey dude")
|
|
|
|
|
|
# custom
|
|
class Cat:
|
|
def __init__(self, name: str):
|
|
self.name = name
|
|
|
|
def call_cat(cat: Cat):
|
|
return f"{cat.name}! Come here!"
|