numpy.DataSource()

class numpy.DataSource(destpath='.') [source]

A generic data source file (file, http, ftp, ...).

DataSources can be local files or remote files/URLs. The files may also be compressed or uncompressed. DataSource hides some of the low-level details of downloading the file, allowing you to simply pass in a valid file path (or URL) and obtain a file object.

Parameters:

Parameters:	destpath : str or None, optional Path to the directory where the source file gets downloaded to for use. If `destpath` is None, a temporary directory will be created. The default path is the current directory.

destpath : str or None, optional

Path to the directory where the source file gets downloaded to for use. If destpath is None, a temporary directory will be created. The default path is the current directory.

Notes

URLs require a scheme string (http://) to be used, without it they will fail:

>>> repos = DataSource()
>>> repos.exists('www.google.com/index.html')
False
>>> repos.exists('http://www.google.com/index.html')
True

Temporary directories are deleted when the DataSource is deleted.

Examples

>>> ds = DataSource('/home/guido')
>>> urlname = 'http://www.google.com/index.html'
>>> gfile = ds.open('http://www.google.com/index.html')  # remote file
>>> ds.abspath(urlname)
'/home/guido/www.google.com/site/index.html'
 
>>> ds = DataSource(None)  # use with temporary file
>>> ds.open('/home/guido/foobar.txt')
<open file '/home/guido.foobar.txt', mode 'r' at 0x91d4430>
>>> ds.abspath('/home/guido/foobar.txt')
'/tmp/tmpy4pgsP/home/guido/foobar.txt'

Methods

`abspath`(path)	Return absolute path of file in the DataSource directory.
`exists`(path)	Test if path exists.
`open`(path[, mode])	Open and return file-like object.

Links:

https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.DataSource.html

doc_NumPy

2025-01-10 15:47:30

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