|
|
# -*- coding: utf-8 -*-
|
|
|
"""Top-level display functions for displaying object in different formats.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
from __future__ import print_function
|
|
|
|
|
|
from xml.dom import minidom
|
|
|
|
|
|
from .displaypub import (
|
|
|
publish_pretty, publish_html,
|
|
|
publish_latex, publish_svg,
|
|
|
publish_png, publish_json,
|
|
|
publish_javascript, publish_jpeg
|
|
|
)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def display(*objs, **kwargs):
|
|
|
"""Display a Python object in all frontends.
|
|
|
|
|
|
By default all representations will be computed and sent to the frontends.
|
|
|
Frontends can decide which representation is used and how.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display.
|
|
|
include : list or tuple, optional
|
|
|
A list of format type strings (MIME types) to include in the
|
|
|
format data dict. If this is set *only* the format types included
|
|
|
in this list will be computed.
|
|
|
exclude : list or tuple, optional
|
|
|
A list of format type string (MIME types) to exclue in the format
|
|
|
data dict. If this is set all format types will be computed,
|
|
|
except for those included in this argument.
|
|
|
"""
|
|
|
include = kwargs.get('include')
|
|
|
exclude = kwargs.get('exclude')
|
|
|
|
|
|
from IPython.core.interactiveshell import InteractiveShell
|
|
|
inst = InteractiveShell.instance()
|
|
|
format = inst.display_formatter.format
|
|
|
publish = inst.display_pub.publish
|
|
|
|
|
|
for obj in objs:
|
|
|
format_dict = format(obj, include=include, exclude=exclude)
|
|
|
publish('IPython.core.display.display', format_dict)
|
|
|
|
|
|
|
|
|
def display_pretty(*objs, **kwargs):
|
|
|
"""Display the pretty (default) representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw text data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_pretty(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain'])
|
|
|
|
|
|
|
|
|
def display_html(*objs, **kwargs):
|
|
|
"""Display the HTML representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw HTML data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_html(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','text/html'])
|
|
|
|
|
|
|
|
|
def display_svg(*objs, **kwargs):
|
|
|
"""Display the SVG representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw svg data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_svg(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','image/svg+xml'])
|
|
|
|
|
|
|
|
|
def display_png(*objs, **kwargs):
|
|
|
"""Display the PNG representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw png data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_png(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','image/png'])
|
|
|
|
|
|
|
|
|
def display_jpeg(*objs, **kwargs):
|
|
|
"""Display the JPEG representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw JPEG data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_jpeg(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','image/jpeg'])
|
|
|
|
|
|
|
|
|
def display_latex(*objs, **kwargs):
|
|
|
"""Display the LaTeX representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw latex data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_latex(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','text/latex'])
|
|
|
|
|
|
|
|
|
def display_json(*objs, **kwargs):
|
|
|
"""Display the JSON representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw json data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_json(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','application/json'])
|
|
|
|
|
|
|
|
|
def display_javascript(*objs, **kwargs):
|
|
|
"""Display the Javascript representation of an object.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
objs : tuple of objects
|
|
|
The Python objects to display, or if raw=True raw javascript data to
|
|
|
display.
|
|
|
raw : bool
|
|
|
Are the data objects raw data or Python objects that need to be
|
|
|
formatted before display? [default: False]
|
|
|
"""
|
|
|
raw = kwargs.pop('raw',False)
|
|
|
if raw:
|
|
|
for obj in objs:
|
|
|
publish_javascript(obj)
|
|
|
else:
|
|
|
display(*objs, include=['text/plain','application/javascript'])
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Smart classes
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class DisplayObject(object):
|
|
|
"""An object that wraps data to be displayed."""
|
|
|
|
|
|
_read_flags = 'r'
|
|
|
|
|
|
def __init__(self, data=None, url=None, filename=None):
|
|
|
"""Create a display object given raw data.
|
|
|
|
|
|
When this object is returned by an expression or passed to the
|
|
|
display function, it will result in the data being displayed
|
|
|
in the frontend. The MIME type of the data should match the
|
|
|
subclasses used, so the Png subclass should be used for 'image/png'
|
|
|
data. If the data is a URL, the data will first be downloaded
|
|
|
and then displayed. If
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
data : unicode, str or bytes
|
|
|
The raw data or a URL to download the data from.
|
|
|
url : unicode
|
|
|
A URL to download the data from.
|
|
|
filename : unicode
|
|
|
Path to a local file to load the data from.
|
|
|
"""
|
|
|
if data is not None and data.startswith('http'):
|
|
|
self.url = data
|
|
|
self.filename = None
|
|
|
self.data = None
|
|
|
else:
|
|
|
self.data = data
|
|
|
self.url = url
|
|
|
self.filename = None if filename is None else unicode(filename)
|
|
|
self.reload()
|
|
|
|
|
|
def reload(self):
|
|
|
"""Reload the raw data from file or URL."""
|
|
|
if self.filename is not None:
|
|
|
with open(self.filename, self._read_flags) as f:
|
|
|
self.data = f.read()
|
|
|
elif self.url is not None:
|
|
|
try:
|
|
|
import urllib2
|
|
|
response = urllib2.urlopen(self.url)
|
|
|
self.data = response.read()
|
|
|
# extract encoding from header, if there is one:
|
|
|
encoding = None
|
|
|
for sub in response.headers['content-type'].split(';'):
|
|
|
sub = sub.strip()
|
|
|
if sub.startswith('charset'):
|
|
|
encoding = sub.split('=')[-1].strip()
|
|
|
break
|
|
|
# decode data, if an encoding was specified
|
|
|
if encoding:
|
|
|
self.data = self.data.decode(encoding, 'replace')
|
|
|
except:
|
|
|
self.data = None
|
|
|
|
|
|
class Pretty(DisplayObject):
|
|
|
|
|
|
def _repr_pretty_(self):
|
|
|
return self.data
|
|
|
|
|
|
|
|
|
class HTML(DisplayObject):
|
|
|
|
|
|
def _repr_html_(self):
|
|
|
return self.data
|
|
|
|
|
|
|
|
|
class Math(DisplayObject):
|
|
|
|
|
|
def _repr_latex_(self):
|
|
|
s = self.data.strip('$')
|
|
|
return "$$%s$$" % s
|
|
|
|
|
|
|
|
|
class Latex(DisplayObject):
|
|
|
|
|
|
def _repr_latex_(self):
|
|
|
return self.data
|
|
|
|
|
|
|
|
|
class SVG(DisplayObject):
|
|
|
|
|
|
# wrap data in a property, which extracts the <svg> tag, discarding
|
|
|
# document headers
|
|
|
_data = None
|
|
|
|
|
|
@property
|
|
|
def data(self):
|
|
|
return self._data
|
|
|
|
|
|
@data.setter
|
|
|
def data(self, svg):
|
|
|
if svg is None:
|
|
|
self._data = None
|
|
|
return
|
|
|
# parse into dom object
|
|
|
x = minidom.parseString(svg)
|
|
|
# get svg tag (should be 1)
|
|
|
found_svg = x.getElementsByTagName('svg')
|
|
|
if found_svg:
|
|
|
svg = found_svg[0].toxml()
|
|
|
else:
|
|
|
# fallback on the input, trust the user
|
|
|
# but this is probably an error.
|
|
|
pass
|
|
|
self._data = svg
|
|
|
|
|
|
def _repr_svg_(self):
|
|
|
return self.data
|
|
|
|
|
|
|
|
|
class JSON(DisplayObject):
|
|
|
|
|
|
def _repr_json_(self):
|
|
|
return self.data
|
|
|
|
|
|
css_t = """$("head").append($("<link/>").attr({
|
|
|
rel: "stylesheet",
|
|
|
type: "text/css",
|
|
|
href: "%s"
|
|
|
}));
|
|
|
"""
|
|
|
|
|
|
lib_t1 = """$.getScript("%s", function () {
|
|
|
"""
|
|
|
lib_t2 = """});
|
|
|
"""
|
|
|
|
|
|
class Javascript(DisplayObject):
|
|
|
|
|
|
def __init__(self, data=None, url=None, filename=None, lib=None, css=None):
|
|
|
"""Create a Javascript display object given raw data.
|
|
|
|
|
|
When this object is returned by an expression or passed to the
|
|
|
display function, it will result in the data being displayed
|
|
|
in the frontend. If the data is a URL, the data will first be
|
|
|
downloaded and then displayed.
|
|
|
|
|
|
In the Notebook, the containing element will be available as `element`,
|
|
|
and jQuery will be available. The output area starts hidden, so if
|
|
|
the js appends content to `element` that should be visible, then
|
|
|
it must call `container.show()` to unhide the area.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
data : unicode, str or bytes
|
|
|
The Javascript source code or a URL to download it from.
|
|
|
url : unicode
|
|
|
A URL to download the data from.
|
|
|
filename : unicode
|
|
|
Path to a local file to load the data from.
|
|
|
lib : list or str
|
|
|
A sequence of Javascript library URLs to load asynchronously before
|
|
|
running the source code. The full URLs of the libraries should
|
|
|
be given. A single Javascript library URL can also be given as a
|
|
|
string.
|
|
|
css: : list or str
|
|
|
A sequence of css files to load before running the source code.
|
|
|
The full URLs of the css files should be give. A single css URL
|
|
|
can also be given as a string.
|
|
|
"""
|
|
|
if isinstance(lib, basestring):
|
|
|
lib = [lib]
|
|
|
elif lib is None:
|
|
|
lib = []
|
|
|
if isinstance(css, basestring):
|
|
|
css = [css]
|
|
|
elif css is None:
|
|
|
css = []
|
|
|
if not isinstance(lib, (list,tuple)):
|
|
|
raise TypeError('expected sequence, got: %r' % lib)
|
|
|
if not isinstance(css, (list,tuple)):
|
|
|
raise TypeError('expected sequence, got: %r' % css)
|
|
|
self.lib = lib
|
|
|
self.css = css
|
|
|
super(Javascript, self).__init__(data=data, url=url, filename=filename)
|
|
|
|
|
|
def _repr_javascript_(self):
|
|
|
r = ''
|
|
|
for c in self.css:
|
|
|
r += css_t % c
|
|
|
for l in self.lib:
|
|
|
r += lib_t1 % l
|
|
|
r += self.data
|
|
|
r += lib_t2*len(self.lib)
|
|
|
return r
|
|
|
|
|
|
|
|
|
class Image(DisplayObject):
|
|
|
|
|
|
_read_flags = 'rb'
|
|
|
|
|
|
def __init__(self, data=None, url=None, filename=None, format=u'png', embed=None):
|
|
|
"""Create a display an PNG/JPEG image given raw data.
|
|
|
|
|
|
When this object is returned by an expression or passed to the
|
|
|
display function, it will result in the image being displayed
|
|
|
in the frontend.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
data : unicode, str or bytes
|
|
|
The raw data or a URL to download the data from.
|
|
|
url : unicode
|
|
|
A URL to download the data from.
|
|
|
filename : unicode
|
|
|
Path to a local file to load the data from.
|
|
|
format : unicode
|
|
|
The format of the image data (png/jpeg/jpg). If a filename or URL is given
|
|
|
for format will be inferred from the filename extension.
|
|
|
embed : bool
|
|
|
Should the image data be embedded using a data URI (True) or be
|
|
|
loaded using an <img> tag. Set this to True if you want the image
|
|
|
to be viewable later with no internet connection in the notebook.
|
|
|
|
|
|
Default is `True`, unless the keyword argument `url` is set, then
|
|
|
default value is `False`.
|
|
|
|
|
|
Note that QtConsole is not able to display images if `embed` is set to `False`
|
|
|
|
|
|
Examples
|
|
|
--------
|
|
|
# embed implicitly True, works in qtconsole and notebook
|
|
|
Image('http://www.google.fr/images/srpr/logo3w.png')
|
|
|
|
|
|
# embed implicitly False, does not works in qtconsole but works in notebook if
|
|
|
# internet connection available
|
|
|
Image(url='http://www.google.fr/images/srpr/logo3w.png')
|
|
|
|
|
|
"""
|
|
|
if filename is not None:
|
|
|
ext = self._find_ext(filename)
|
|
|
elif url is not None:
|
|
|
ext = self._find_ext(url)
|
|
|
elif data.startswith('http'):
|
|
|
ext = self._find_ext(data)
|
|
|
else:
|
|
|
ext = None
|
|
|
if ext is not None:
|
|
|
if ext == u'jpg' or ext == u'jpeg':
|
|
|
format = u'jpeg'
|
|
|
if ext == u'png':
|
|
|
format = u'png'
|
|
|
self.format = unicode(format).lower()
|
|
|
self.embed = embed if embed is not None else (url is None)
|
|
|
super(Image, self).__init__(data=data, url=url, filename=filename)
|
|
|
|
|
|
def reload(self):
|
|
|
"""Reload the raw data from file or URL."""
|
|
|
if self.embed:
|
|
|
super(Image,self).reload()
|
|
|
|
|
|
def _repr_html_(self):
|
|
|
if not self.embed:
|
|
|
return u'<img src="%s" />' % self.url
|
|
|
|
|
|
def _repr_png_(self):
|
|
|
if self.embed and self.format == u'png':
|
|
|
return self.data
|
|
|
|
|
|
def _repr_jpeg_(self):
|
|
|
if self.embed and (self.format == u'jpeg' or self.format == u'jpg'):
|
|
|
return self.data
|
|
|
|
|
|
def _find_ext(self, s):
|
|
|
return unicode(s.split('.')[-1].lower())
|
|
|
|
|
|
|
|
|
def clear_output(stdout=True, stderr=True, other=True):
|
|
|
"""Clear the output of the current cell receiving output.
|
|
|
|
|
|
Optionally, each of stdout/stderr or other non-stream data (e.g. anything
|
|
|
produced by display()) can be excluded from the clear event.
|
|
|
|
|
|
By default, everything is cleared.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
stdout : bool [default: True]
|
|
|
Whether to clear stdout.
|
|
|
stderr : bool [default: True]
|
|
|
Whether to clear stderr.
|
|
|
other : bool [default: True]
|
|
|
Whether to clear everything else that is not stdout/stderr
|
|
|
(e.g. figures,images,HTML, any result of display()).
|
|
|
"""
|
|
|
from IPython.core.interactiveshell import InteractiveShell
|
|
|
if InteractiveShell.initialized():
|
|
|
InteractiveShell.instance().display_pub.clear_output(
|
|
|
stdout=stdout, stderr=stderr, other=other,
|
|
|
)
|
|
|
else:
|
|
|
from IPython.utils import io
|
|
|
if stdout:
|
|
|
print('\033[2K\r', file=io.stdout, end='')
|
|
|
io.stdout.flush()
|
|
|
if stderr:
|
|
|
print('\033[2K\r', file=io.stderr, end='')
|
|
|
io.stderr.flush()
|
|
|
|
|
|
|
