get_readable_fileobj(name_or_obj, encoding=None, cache=False, show_progress=True, remote_timeout=None, sources=None, http_headers=None)
This supports passing filenames, URLs, and readable file-like objects, any of which can be compressed in gzip, bzip2 or lzma (xz) if the appropriate compression libraries are provided by the Python installation.
This function is a context manager, and should be used for example as:
with get_readable_fileobj('file.dat') as f:
contents = f.read()
If a URL is provided and the cache is in use, the provided URL will be the name used in the cache. The contents may already be stored in the cache under this URL provided, they may be downloaded from this URL, or they may be downloaded from one of the locations listed in sources
. See :None:None:`~download_file` for details.
The filename of the file to access (if given as a string), or the file-like object to access.
If a file-like object, it must be opened in binary mode.
When :None:None:`None` (default), returns a file-like object with a read
method that returns :None:None:`str` ( unicode
) objects, using locale.getpreferredencoding
as an encoding. This matches the default behavior of the built-in :None:None:`open` when no mode
argument is provided.
When 'binary'
, returns a file-like object where its read
method returns :None:None:`bytes` objects.
When another string, it is the name of an encoding, and the file-like object's read
method will return :None:None:`str` ( unicode
) objects, decoded from binary using the given encoding.
Whether to cache the contents of remote URLs. If "update", check the remote URL for a new version but store the result in the cache.
Whether to display a progress bar if the file is downloaded from a remote server. Default is :None:None:`True`.
Timeout for remote requests in seconds (default is the configurable :None:None:`astropy.utils.data.Conf.remote_timeout`).
If provided, a list of URLs to try to obtain the file from. The result will be stored under the original URL. The original URL will not be tried unless it is in this list; this is to prevent long waits for a primary server that is known to be inaccessible at the moment.
HTTP request headers to pass into urlopen
if needed. (These headers are ignored if the protocol for the name_or_obj
/ sources
entry is not a remote HTTP URL.) In the default case (None), the headers are User-Agent: some_value
and Accept: */*
, where some_value
is set by astropy.utils.data.conf.default_http_user_agent
.
Yield a readable, seekable file-like object from a file or URL.
The following pages refer to to this document either explicitly or contain code examples using this.
astropy.utils.data.get_file_contents
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them