numpy.DataSource — NumPy v1.15 Manual (original) (raw)
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: | 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. |
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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. |
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| exists(path) | Test if path exists. |
| open(path[, mode, encoding, newline]) | Open and return file-like object. |