O objeto FileLink para este cabeçalho#

A classe FileLink para este cabeçalho#

class File(file_object)Link para esta definição#

The File class is a thin wrapper around a Python file object with some Django-specific additions. Internally, Django uses this class when it needs to represent a file.

File objects have the following attributes and methods:

nameLink para esta definição#

The name of the file including the relative path from MEDIA_ROOT.

sizeLink para esta definição#

The size of the file in bytes.

fileLink para esta definição#

The underlying file object that this class wraps.

modeLink para esta definição#

The read/write mode for the file.

open(mode=None)Link para esta definição#

Open or reopen the file (which also does File.seek(0)). The mode argument allows the same values as Python’s built-in open().

When reopening a file, mode will override whatever mode the file was originally opened with; None means to reopen with the original mode.

It can be used as a context manager, e.g. with file.open() as f:.

__iter__()Link para esta definição#

Iterate over the file yielding one line at a time.

chunks(chunk_size=None)Link para esta definição#

Iterate over the file yielding “chunks” of a given size. chunk_size defaults to 64 KB.

This is especially useful with very large files since it allows them to be streamed off disk and avoids storing the whole file in memory.

multiple_chunks(chunk_size=None)Link para esta definição#

Returns True if the file is large enough to require multiple chunks to access all of its content give some chunk_size.

close()Link para esta definição#

Feche o arquivo.

In addition to the listed methods, File exposes the following attributes and methods of its file object: encoding, fileno, flush, isatty, newlines, read, readinto, readline, readlines, seek, tell, truncate, write, writelines, readable(), writable(), and seekable().

The ContentFile classLink para este cabeçalho#

class ContentFile(File)Link para esta definição#

The ContentFile class inherits from File, but unlike File it operates on string content (bytes also supported), rather than an actual file. For example:

Code

from django.core.files.base import ContentFile

f1 = ContentFile("esta sentencia está en español")
f2 = ContentFile(b"these are bytes")

A classe ImageFileLink para este cabeçalho#

class ImageFile(file_object)Link para esta definição#

Django provides a built-in class specifically for images. django.core.files.images.ImageFile inherits all the attributes and methods of File, and additionally provides the following:

widthLink para esta definição#

Width of the image in pixels.

heightLink para esta definição#

Height of the image in pixels.

Additional methods on files attached to objectsLink para este cabeçalho#

Any File that is associated with an object (as with Car.photo, below) will also have a couple of extra methods:

File.save(name, content, save=True)Link para esta definição#

Saves a new file with the file name and contents provided. This will not replace the existing file, but will create a new file and update the object to point to it. If save is True, the model’s save() method will be called once the file is saved. That is, these two lines:

Code

>>> car.photo.save('myphoto.jpg', content, save=False)
>>> car.save()

are equivalent to:

Code

>>> car.photo.save('myphoto.jpg', content, save=True)

Note that the content argument must be an instance of either File or of a subclass of File, such as ContentFile.

File.delete(save=True)Link para esta definição#

Removes the file from the model instance and deletes the underlying file. If save is True, the model’s save() method will be called once the file is deleted.