prompt-args 1.0.1

Decorator to prompt input for missing arguments.

Decorator to prompt input for missing arguments.

Install

pip install prompt_args

Usage

from prompt_args import Prompt

print("Test automatic prompting")
@Prompt.decorate
def my_func(first_name: str, last_name: str = "", status: str = "well"):
    print(f"Hello, {first_name} {last_name}, I am {status}")

my_func()


print("\nTest controlled prompting")
@Prompt.decorate(
    first_name=Prompt("First Name: "),
    last_name=Prompt("Last Name: ", default=""),
    status=Prompt("How are you? ", default="well")
)
def my_func(first_name: str, last_name: str, **kwargs):
    print(f"Hello, {first_name} {last_name}, I am {kwargs.get('status')}")

my_func()
my_func("Jane", "Doe", status="great")

# Test error when a prompt is given, but the function argument does not exist
print("\nTest controlled prompt error")
try:
    @Prompt.decorate(
        first_name=Prompt("First Name: "),
        last_name=Prompt("Last Name: ", default=""),
        status=Prompt("How are you? ", default="well")
    )
    def my_func(first_name: str, last_name: str):
        print(f"Hello, {first_name} {last_name}")
except ValueError as e:
    assert "no corresponding function argument" in str(e)

Output

Test automatic prompting
Enter First Name: John
Enter Last Name ['']:
Enter Status ['well']:
Hello, John , I am well

Test controlled prompting
First Name: John
Last Name ['']: Doe
How are you ['well']? just fine
Hello, John Doe, I am just fine
Hello, Jane Doe, I am great

Test controlled prompt error

Register prompt helpers (“Enter … [{prompt_help}]: “).

from prompt_args import Prompt

# Test built in bool converter with Y/n prompt help info
print("Testing builtin type converter")
@Prompt.decorate
def my_func(x: int, confirm: bool = False):
    print(f"Change x to {x}? {confirm}")

# Test no
my_func()

# Test y
my_func()


# Test custom type converter
print("\nTesting custom type converter")
def long_confirm(value: str) -> bool:
    return value == "Yes I am sure"

Prompt.register_type_converter(bool, long_confirm, prompt_help="Yes I am sure/no")

@Prompt.decorate
def my_super_serious_func(x: int, confirm: bool = False):
    print(f"Change x to {x}? {confirm}")

# Test invalid y
my_super_serious_func()

# Test full Yes I am sure
my_super_serious_func()

Output:

Testing builtin type converter
Enter X: 10
Enter Confirm [Y/n]: n
Change x to 10? False
Enter X: 12
Enter Confirm [Y/n]: y
Change x to 12? True

Testing custom type converter
Enter X: 20
Enter Confirm [Yes I am sure/no]: y
Change x to 20? False
Enter X: 25
Enter Confirm [Yes I am sure/no]: Yes I am sure
Change x to 25? True

Do not prompt for some arguments

from prompt_args import Prompt

print("Test no prompting for some arguments")
@Prompt.decorate(status=Prompt.no_prompt)
def my_func(first_name: str, last_name: str = "", status: str = "well"):
    print(f"Hello, {first_name} {last_name}, I am {status}")

# Status should not be prompted
my_func()

Output

Test no prompting for some arguments
Enter First Name: John
Enter Last Name ['']: Doe
Hello, John Doe, I am well