e1

Name	e1 JSON
Version	0.1.2 JSON
	download
home_page	https://github.com/LANL-seismoacoustics/e1
Summary	Python support for the e1 compression format.
upload_time	2023-01-17 23:09:28
maintainer
docs_url	None
author	Jonathan MacCarthy
requires_python
license	MIT
keywords	seismology geophysics
VCS
bugtrack_url
requirements	No requirements were recorded.
Travis-CI	No Travis.
coveralls test coverage	No coveralls.

            # e1.py

Python support for the e1 seismic compression format.

"e1" is a variable-length compression algorithm for int32 data.


## Installation

```python
pip install e1
```

## Usage

### Decompress data from a file

```python
import e1

file_name = 'some_file.w'
byte_offset = 0
nsamples = 1000

with open(file_name, 'rb') as f:
    f.seek(byte_offset)
    data = e1.decompress_file(f, nsamples)

```

### Decompress raw bytes

```python
with open(file_name, 'rb') as f:
    # Read 5 times as many bytes as you expecte from nsamples x 4-byte values,
    # just to make sure all your nsamples are in it.  Though it may be more data
    # than you need, this gaurds against poorly-compressed data.  
    # In e1, you don't know a priori how many bytes it took to compress your data.
    nbytes = 5 * nsamples * 4
    byts = f.read(nbytes)

data = decompress(byts, nsamples)
```



            

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