1
import typer
2
from typing_extensions import Annotated
3

4
app = typer.Typer(
5
    no_args_is_help=True, # 这个flag用来设置当没有程序没有任何输入时，返回help。
6
    help="your program help" # 这里填入你的主程序帮助。
7
)
8

9

10
@app.command(help="your sub command help") # 这个help填入你的子命令帮助，下面的help则是参数和选项的帮助。
11
def hello(name: Annotated[str, typer.Arguement(help="your name")]): # Typer建议采用类型标注来规定输入参数，不用也可以。
12
    print(f"Hello {name}.")
13

14

15
@app.command(help="your another command help")
16
def goodbye(name: str = typer.Arguement(..., help="your name")): # 不用类型标注则是这种形式。
17
    print(f"Goodbye {name}.")
18

19

20
def main():
21
    app()
22

23

24
if __name__ == "__main__":
25
    main()

1
import typer
2

3
app = typer.Typer(
4
    no_args_is_help=True, # 这个flag用来设置当没有程序没有任何输入时，返回help。
5
    help="your program help" # 这里填入你的主程序简介。
6
)
7

8

9
@app.command(help="your sub command help") # 当程序只有一个子命令时，这里不需要填帮助。
10
def hello(name: Annotated[str, typer.Arguement()]):
11
    print(f"Hello {name}.")
12

13

14
def main():
15
    app()
16

17

18
if __name__ == "__main__":
19
    main()

1
import typer
2
from typing_extensions import Annotated
3
from typing import Literal
4

5

6
def app(
7
    name: Annotated[str, typer.Arguement(help="your name")],
8
    fromal: Annotated[bool, typer.Option("--fromal", "-f", help="Say hi formally.")] = False,
9
    sex: Annotated[Literal["male", "female"], typer.Option("--sex", "-s", help="male or female")] = "male"
10
    ):
11
    if fromal:
12
        if sex == "male":
13
            print(f"Good day Mr. {name}.")
14
        else:
15
            print(f"Good day Ms. {name}.")
16
    else:
17
        print(f"Hello {name}.")

1
import time
2
from rich.progress import track
3
for i in track(range(20), description="Processing..."):
4
    time.sleep(0.1)
5
print("Process done.")

1
import time
2
from rich.progress import Progress, SpinnerColumn, TextColumn
3

4
with Progress(
5
    SpinnerColumn(),
6
    TextColumn("[progress.description]{task.description}"),
7
    transient=Ture,
8
) as progress:
9
    progress.add_task(description="Processing...", total=None)
10
    time.sleep(3)
11
print("Process done.")

1
import logging
2
try:
3
    from scipy import constants
4
except ImportError as e:
5
    print(f"{e.name} is not in the library, please check package.")
6
    logging.error(f"{e.name} is not in the library, please check package.")

1
class MissingValueError(Exception):
2
    def __init__(self, message, value=None, list=None):
3
        super().__init__(message)  #调用父类的初始化方法
4
        self.value = value      #初始化异常信息中的值
5
        self.list = list      #初始化异常信息中的值
6
    def __str__(self):
7
        return f"{self.value} is not in {self.list}"
8

9
def example:
10
    list = ["a", "b", "c"]
11
    if "d" not in list:
12
        raise MissingValueError(value="d", list=list)

1
import logging
2
try:
3
    example()
4
except MissingValueError as e:
5
    print(e)       #自定义异常的描述信息可以直接在异常处理时调用，避免重复书写
6
    logging.error(e)