iterpop

0.4.1 verified Fri May 01 auth: no python

iterpop provides safe and convenient functions to pop a single value from a container, avoiding manual length checks. Current version 0.4.1, stable. Low release cadence.

pip install iterpop

Common errors

error ValueError: The container has more than one element ↓

cause pop_singular called on a container with length != 1.

fix

Verify container has exactly one element before calling pop_singular, or use pop_equals_unique if you want to compare uniqueness across multiple containers.

error ValueError: The container is empty ↓

cause pop_singular called on an empty container.

fix

Ensure container has at least one element, or handle exception.

Warnings

gotcha pop_singular expects exactly one element. If the container is empty or has more than one, it raises a ValueError. This is by design, but newcomers may expect a default or None. ↓

fix Catch ValueError or ensure container length is 1.

gotcha pop_singular modifies the container in place (like list.pop()). It does not return a copy. If you need the original unchanged, make a copy first. ↓

fix Use copy before calling: items_copy = items[:]; value = pop_singular(items_copy).

Imports

pop_singular
```
from iterpop import pop_singular
```
Standard import path.
pop_equals_unique
```
from iterpop import pop_equals_unique
```
Standard import path.

Quickstart

Pop the single element from a list, raising an error if not exactly one element.

from iterpop import pop_singular

items = [42]
value = pop_singular(items)
print(value)  # 42