| Name | lange JSON |
| Version |
1.230203.2
JSON |
| download |
| home_page | |
| Summary | Haskell-like intervals for Python |
| upload_time | 2023-02-04 20:02:33 |
| maintainer | |
| docs_url | None |
| author | davips |
| requires_python | >=3.8,<4.0 |
| license | GPLv3 |
| keywords |
|
| VCS |
|
| bugtrack_url |
|
| requirements |
No requirements were recorded.
|
| Travis-CI |
No Travis.
|
| coveralls test coverage |
No coveralls.
|
[](https://codecov.io/gh/davips/lange)
<a href="https://pypi.org/project/lange">
<img src="https://img.shields.io/pypi/v/lange.svg?label=release&color=blue&style=flat-square" alt="pypi">
</a>
[](https://www.gnu.org/licenses/gpl-3.0)
<!--- [](https://doi.org/10.5281/zenodo.5501845) --->
<!--- [](https://arxiv.org/abs/2109.06028) --->
[](https://davips.github.io/lange)
# lange
Lazy lists (i.e. Haskell-like ranges) for Python.
[Latest release](https://pypi.org/project/lange) |
[Current code](https://github.com/davips/lange) |
[API documentation](https://davips.github.io/lange)
## Installation
### from package
```bash
# Set up a virtualenv.
python3 -m venv venv
source venv/bin/activate
# Install from PyPI
pip install lange
```
### from source
```bash
cd my-project
git clone https://github.com/davips/lange ../lange
pip install -e ../lange
```
### Features
* Stable floating-point range generation, e.g.: `0.8 - 0.6 == 0.2` up to 28 digits (customizable).
* Infinite `[1 2 ...]` or bounded.
* O(1) access/evaluation `lst[3443]`
### Examples
**Arithmetic Progression**
<details>
<p>
```python3
# Bounded
from lange import ap
print(ap[0.4, 0.8, ..., 2])
"""
[0.4 0.8 .+. 2.0]
"""
```
```python3
# Infinite + slicing
prog = ap[0.4, 0.8, ...]
print(prog[:5])
"""
[0.4 0.8 .+. 2.0]
"""
```
```python3
# As list
print(list(prog[:5]))
"""
[0.4, 0.8, 1.2, 1.6, 2.0]
"""
```
```python3
print(prog[:5].l)
"""
[0.4, 0.8, 1.2, 1.6, 2.0]
"""
```
```python3
# Towards negative.
print(ap[1, -2, ..., -8].l)
"""
[1, -2, -5, -8]
"""
```
</p>
</details>
**Geometric Progression**
<details>
<p>
```python3
# Bounded
from lange import gp
print(gp[0.4, 0.8, ..., 2])
"""
[0.4 0.8 1.6]
"""
```
```python3
# Infinite + slicing
prog = gp[0.4, 0.8, ...]
print(prog[:5])
"""
[0.4 0.8 .*. 6.4]
"""
```
```python3
# As list
print(list(prog[:5]))
"""
[0.4, 0.8, 1.6, 3.2, 6.4]
"""
```
```python3
print(prog[:5].l)
"""
[0.4, 0.8, 1.6, 3.2, 6.4]
"""
```
```python3
# Using negative step.
print(gp[1, -2, ..., 130].l)
"""
[1, -2, 4, -8, 16, -32, 64, -128]
"""
```
</p>
</details>
## Other projects
Please access this [website](https://hosh.page/projects) for more information.
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