matplotlib.text¶

Classes for including text in a figure.

class matplotlib.text.Annotation(text, xy, xytext=None, xycoords='data', textcoords=None, arrowprops=None, annotation_clip=None, **kwargs)[source]

Bases: matplotlib.text.Text, matplotlib.text._AnnotationBase

An Annotation is a Text that can refer to a specific position xy. Optionally an arrow pointing from the text to xy can be drawn.

Attributes: xyThe annotated position. xycoordsThe coordinate system for xy. arrow_patchA FancyArrowPatch to point from xytext to xy.

Annotate the point xy with text text.

In the simplest form, the text is placed at xy.

Optionally, the text can be displayed in another position xytext. An arrow pointing from the text to the annotated point xy can then be added by defining arrowprops.

Parameters:
textstr

The text of the annotation.

xy(float, float)

The point (x, y) to annotate. The coordinate system is determined by xycoords.

xytext(float, float), default: xy

The position (x, y) to place the text at. The coordinate system is determined by textcoords.

xycoordsstr or Artist or Transform or callable or (float, float), default: 'data'

The coordinate system that xy is given in. The following types of values are supported:

• One of the following strings:

Value Description
'figure points' Points from the lower left of the figure
'figure pixels' Pixels from the lower left of the figure
'figure fraction' Fraction of figure from lower left
'subfigure points' Points from the lower left of the subfigure
'subfigure pixels' Pixels from the lower left of the subfigure
'subfigure fraction' Fraction of subfigure from lower left
'axes points' Points from lower left corner of axes
'axes pixels' Pixels from lower left corner of axes
'axes fraction' Fraction of axes from lower left
'data' Use the coordinate system of the object being annotated (default)
'polar' (theta, r) if not native 'data' coordinates

Note that 'subfigure pixels' and 'figure pixels' are the same for the parent figure, so users who want code that is usable in a subfigure can use 'subfigure pixels'.

• An Artist: xy is interpreted as a fraction of the artist's Bbox. E.g. (0, 0) would be the lower left corner of the bounding box and (0.5, 1) would be the center top of the bounding box.

• A Transform to transform xy to screen coordinates.

• A function with one of the following signatures:

def transform(renderer) -> Bbox
def transform(renderer) -> Transform


where renderer is a RendererBase subclass.

The result of the function is interpreted like the Artist and Transform cases above.

• A tuple (xcoords, ycoords) specifying separate coordinate systems for x and y. xcoords and ycoords must each be of one of the above described types.

See Advanced Annotations for more details.

textcoordsstr or Artist or Transform or callable or (float, float), default: value of xycoords

The coordinate system that xytext is given in.

All xycoords values are valid as well as the following strings:

Value Description
'offset points' Offset (in points) from the xy value
'offset pixels' Offset (in pixels) from the xy value
arrowpropsdict, optional

The properties used to draw a FancyArrowPatch arrow between the positions xy and xytext. Note that the edge of the arrow pointing to xytext will be centered on the text itself and may not point directly to the coordinates given in xytext.

If arrowprops does not contain the key 'arrowstyle' the allowed keys are:

Key Description
width The width of the arrow in points
headwidth The width of the base of the arrow head in points
shrink Fraction of total length to shrink from both ends
? Any key to matplotlib.patches.FancyArrowPatch

If arrowprops contains the key 'arrowstyle' the above keys are forbidden. The allowed values of 'arrowstyle' are:

Name Attrs
'-' None
'->' head_length=0.4,head_width=0.2
'-[' widthB=1.0,lengthB=0.2,angleB=None
'|-|' widthA=1.0,widthB=1.0
'-|>' head_length=0.4,head_width=0.2
'<-' head_length=0.4,head_width=0.2
'<->' head_length=0.4,head_width=0.2
'<|-' head_length=0.4,head_width=0.2
'<|-|>' head_length=0.4,head_width=0.2
'fancy' head_length=0.4,head_width=0.4,tail_width=0.4
'simple' head_length=0.5,head_width=0.5,tail_width=0.2
'wedge' tail_width=0.3,shrink_factor=0.5

Valid keys for FancyArrowPatch are:

Key Description
arrowstyle the arrow style
connectionstyle the connection style
relpos default is (0.5, 0.5)
patchA default is bounding box of the text
patchB default is None
shrinkA default is 2 points
shrinkB default is 2 points
mutation_scale default is text size (in points)
mutation_aspect default is 1.
? any key for matplotlib.patches.PathPatch

Defaults to None, i.e. no arrow is drawn.

annotation_clipbool or None, default: None

Whether to draw the annotation when the annotation point xy is outside the axes area.

• If True, the annotation will only be drawn when xy is within the axes.
• If False, the annotation will always be drawn.
• If None, the annotation will only be drawn when xy is within the axes and xycoords is 'data'.
**kwargs

Additional kwargs are passed to Text.

Returns:
Annotation
property anncoords

The coordinate system to use for Annotation.xyann.

contains(self, event)[source]

Return whether the mouse event occurred inside the axis-aligned bounding-box of the text.

draw(self, renderer)[source]

Draw the Artist (and its children) using the given renderer.

This has no effect if the artist is not visible (Artist.get_visible returns False).

Parameters: rendererRendererBase subclass.

Notes

This method is overridden in the Artist subclasses.

get_anncoords(self)[source]

Return the coordinate system to use for Annotation.xyann.

See also xycoords in Annotation.

get_tightbbox(self, renderer)[source]

Like Artist.get_window_extent, but includes any clipping.

Parameters: rendererRendererBase subclassrenderer that will be used to draw the figures (i.e. fig.canvas.get_renderer()) BboxThe enclosing bounding box (in figure pixel coordinates).
get_window_extent(self, renderer=None)[source]

Return the Bbox bounding the text and arrow, in display units.

Parameters: rendererRenderer, optionalA renderer is needed to compute the bounding box. If the artist has already been drawn, the renderer is cached; thus, it is only necessary to pass this argument when calling get_window_extent before the first draw. In practice, it is usually easier to trigger a draw first (e.g. by saving the figure).
set_anncoords(self, coords)[source]

Set the coordinate system to use for Annotation.xyann.

See also xycoords in Annotation.

set_figure(self, fig)[source]

Set the Figure instance the artist belongs to.

Parameters: figFigure
update_positions(self, renderer)[source]

Update the pixel positions of the annotation text and the arrow patch.

property xyann

The text position.

See also xytext in Annotation.

property xycoords
class matplotlib.text.OffsetFrom(artist, ref_coord, unit='points')[source]

Bases: object

Callable helper class for working with Annotation.

Parameters: artistThe object to compute the offset from. ref_coord(float, float)If artist is an Artist or BboxBase, this values is the location to of the offset origin in fractions of the artist bounding box. If artist is a transform, the offset origin is the transform applied to this value. unit{'points, 'pixels'}, default: 'points'The screen units to use (pixels or points) for the offset input.
get_unit(self)[source]

Return the unit for input to the transform used by __call__.

set_unit(self, unit)[source]

Set the unit for input to the transform used by __call__.

Parameters: unit{'points', 'pixels'}
class matplotlib.text.Text(x=0, y=0, text='', color=None, verticalalignment='baseline', horizontalalignment='left', multialignment=None, fontproperties=None, rotation=None, linespacing=None, rotation_mode=None, usetex=None, wrap=False, transform_rotates_text=False, **kwargs)[source]

Handle storing and drawing of text in window or data coordinates.

Create a Text instance at x, y with string text.

Valid keyword arguments are:

Property Description
agg_filter a filter function, which takes a (m, n, 3) float array and a dpi value, and returns a (m, n, 3) array
alpha scalar or None
animated bool
backgroundcolor color
bbox dict with properties for patches.FancyBboxPatch
clip_box Bbox
clip_on bool
clip_path Patch or (Path, Transform) or None
color or c color
contains unknown
figure Figure
fontfamily or family {FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}
fontproperties or font or font_properties font_manager.FontProperties or str or pathlib.Path
fontsize or size float or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}
fontstretch or stretch {a numeric value in range 0-1000, 'ultra-condensed', 'extra-condensed', 'condensed', 'semi-condensed', 'normal', 'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'}
fontstyle or style {'normal', 'italic', 'oblique'}
fontvariant or variant {'normal', 'small-caps'}
fontweight or weight {a numeric value in range 0-1000, 'ultralight', 'light', 'normal', 'regular', 'book', 'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy', 'extra bold', 'black'}
gid str
horizontalalignment or ha {'center', 'right', 'left'}
in_layout bool
label object
linespacing float (multiple of font size)
math_fontfamily str
multialignment or ma {'left', 'right', 'center'}
path_effects AbstractPathEffect
picker None or bool or float or callable
position (float, float)
rasterized bool
rotation float or {'vertical', 'horizontal'}
rotation_mode {None, 'default', 'anchor'}
sketch_params (scale: float, length: float, randomness: float)
snap bool or None
text object
transform Transform
transform_rotates_text bool
url str
usetex bool or None
verticalalignment or va {'center', 'top', 'bottom', 'baseline', 'center_baseline'}
visible bool
wrap bool
x float
y float
zorder float
contains(self, mouseevent)[source]

Return whether the mouse event occurred inside the axis-aligned bounding-box of the text.

draw(self, renderer)[source]

Draw the Artist (and its children) using the given renderer.

This has no effect if the artist is not visible (Artist.get_visible returns False).

Parameters: rendererRendererBase subclass.

Notes

This method is overridden in the Artist subclasses.

get_bbox_patch(self)[source]

Return the bbox Patch, or None if the patches.FancyBboxPatch is not made.

get_c(self)

Alias for get_color.

get_color(self)[source]

Return the color of the text.

get_family(self)

Alias for get_fontfamily.

get_font(self)

Alias for get_fontproperties.

get_font_properties(self)

Alias for get_fontproperties.

get_fontfamily(self)[source]

Return the list of font families used for font lookup.

get_fontname(self)[source]

Return the font name as a string.

get_fontproperties(self)[source]

Return the font_manager.FontProperties.

get_fontsize(self)[source]

Return the font size as an integer.

get_fontstyle(self)[source]

Return the font style as a string.

get_fontvariant(self)[source]

Return the font variant as a string.

get_fontweight(self)[source]

Return the font weight as a string or a number.

get_ha(self)

Alias for get_horizontalalignment.

get_horizontalalignment(self)[source]

Return the horizontal alignment as a string. Will be one of 'left', 'center' or 'right'.

get_math_fontfamily(self)[source]

Return the font family name for math text rendered by Matplotlib.

The default value is rcParams["mathtext.fontset"] (default: 'dejavusans').

get_name(self)

Alias for get_fontname.

get_position(self)[source]

Return the (x, y) position of the text.

get_prop_tup(self, renderer=None)[source]

Return a hashable tuple of properties.

Not intended to be human readable, but useful for backends who want to cache derived information about text (e.g., layouts) and need to know if the text has changed.

get_rotation(self)[source]

Return the text angle in degrees between 0 and 360.

get_rotation_mode(self)[source]

Return the text rotation mode.

get_size(self)

Alias for get_fontsize.

get_stretch(self)[source]

Return the font stretch as a string or a number.

get_style(self)

Alias for get_fontstyle.

get_text(self)[source]

Return the text string.

get_transform_rotates_text(self)[source]

Return whether rotations of the transform affect the text direction.

get_unitless_position(self)[source]

Return the (x, y) unitless position of the text.

get_usetex(self)[source]

Return whether this Text object uses TeX for rendering.

get_va(self)

Alias for get_verticalalignment.

get_variant(self)

Alias for get_fontvariant.

get_verticalalignment(self)[source]

Return the vertical alignment as a string. Will be one of 'top', 'center', 'bottom', 'baseline' or 'center_baseline'.

get_weight(self)

Alias for get_fontweight.

get_window_extent(self, renderer=None, dpi=None)[source]

Return the Bbox bounding the text, in display units.

In addition to being used internally, this is useful for specifying clickable regions in a png file on a web page.

Parameters: rendererRenderer, optionalA renderer is needed to compute the bounding box. If the artist has already been drawn, the renderer is cached; thus, it is only necessary to pass this argument when calling get_window_extent before the first draw. In practice, it is usually easier to trigger a draw first (e.g. by saving the figure). dpifloat, optionalThe dpi value for computing the bbox, defaults to self.figure.dpi (not the renderer dpi); should be set e.g. if to match regions with a figure saved with a custom dpi value.
get_wrap(self)[source]

Return whether the text can be wrapped.

set_backgroundcolor(self, color)[source]

Set the background color of the text by updating the bbox.

Parameters: colorcolor

set_bbox
To change the position of the bounding box
set_bbox(self, rectprops)[source]

Draw a bounding box around self.

Parameters: rectpropsdict with properties for patches.FancyBboxPatchThe default boxstyle is 'square'. The mutation scale of the patches.FancyBboxPatch is set to the fontsize.

Examples

t.set_bbox(dict(facecolor='red', alpha=0.5))

set_c(self, color)

Alias for set_color.

set_clip_box(self, clipbox)[source]

Set the artist's clip Bbox.

Parameters: clipboxBbox
set_clip_on(self, b)[source]

Set whether the artist uses clipping.

When False artists will be visible outside of the axes which can lead to unexpected results.

Parameters: bbool
set_clip_path(self, path, transform=None)[source]

Set the artist's clip path.

Parameters: pathThe clip path. If given a Path, transform must be provided as well. If None, a previously set clip path is removed. transformTransform, optionalOnly used if path is a Path, in which case the given Path is converted to a TransformedPath using transform.

Notes

For efficiency, if path is a Rectangle this method will set the clipping box to the corresponding rectangle and set the clipping path to None.

For technical reasons (support of set), a tuple (path, transform) is also accepted as a single positional parameter.

set_color(self, color)[source]

Set the foreground color of the text

Parameters: colorcolor
set_family(self, fontname)

Alias for set_fontfamily.

set_font(self, fp)

Alias for set_fontproperties.

set_font_properties(self, fp)

Alias for set_fontproperties.

set_fontfamily(self, fontname)[source]

Set the font family. May be either a single string, or a list of strings in decreasing priority. Each string may be either a real font name or a generic font class name. If the latter, the specific font names will be looked up in the corresponding rcParams.

If a Text instance is constructed with fontfamily=None, then the font is set to rcParams["font.family"] (default: ['sans-serif']), and the same is done when set_fontfamily() is called on an existing Text instance.

Parameters: fontname{FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}
set_fontname(self, fontname)[source]

Alias for set_family.

One-way alias only: the getter differs.

Parameters: fontname{FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}
set_fontproperties(self, fp)[source]

Set the font properties that control the text.

Parameters: fpIf a str, it is interpreted as a fontconfig pattern parsed by FontProperties. If a pathlib.Path, it is interpreted as the absolute path to a font file.
set_fontsize(self, fontsize)[source]

Set the font size.

Parameters: fontsizefloat or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}If float, the fontsize in points. The string values denote sizes relative to the default font size.
set_fontstretch(self, stretch)[source]

Set the font stretch (horizontal condensation or expansion).

Parameters: stretch{a numeric value in range 0-1000, 'ultra-condensed', 'extra-condensed', 'condensed', 'semi-condensed', 'normal', 'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'}
set_fontstyle(self, fontstyle)[source]

Set the font style.

Parameters: fontstyle{'normal', 'italic', 'oblique'}
set_fontvariant(self, variant)[source]

Set the font variant.

Parameters: variant{'normal', 'small-caps'}
set_fontweight(self, weight)[source]

Set the font weight.

Parameters: weight{a numeric value in range 0-1000, 'ultralight', 'light', 'normal', 'regular', 'book', 'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy', 'extra bold', 'black'}
set_ha(self, align)

Alias for set_horizontalalignment.

set_horizontalalignment(self, align)[source]

Set the horizontal alignment to one of

Parameters: align{'center', 'right', 'left'}
set_linespacing(self, spacing)[source]

Set the line spacing as a multiple of the font size.

The default line spacing is 1.2.

Parameters: spacingfloat (multiple of font size)
set_ma(self, align)

Alias for set_multialignment.

set_math_fontfamily(self, fontfamily)[source]

Set the font family for math text rendered by Matplotlib.

This does only affect Matplotlib's own math renderer. It has no effect when rendering with TeX (usetex=True).

Parameters: fontfamilystrThe name of the font family. Available font families are defined in the matplotlibrc.template file.
set_multialignment(self, align)[source]

Set the text alignment for multiline texts.

The layout of the bounding box of all the lines is determined by the horizontalalignment and verticalalignment properties. This property controls the alignment of the text lines within that box.

Parameters: align{'left', 'right', 'center'}
set_name(self, fontname)

Alias for set_fontname.

set_position(self, xy)[source]

Set the (x, y) position of the text.

Parameters: xy(float, float)
set_rotation(self, s)[source]

Set the rotation of the text.

Parameters: sfloat or {'vertical', 'horizontal'}The rotation angle in degrees in mathematically positive direction (counterclockwise). 'horizontal' equals 0, 'vertical' equals 90.
set_rotation_mode(self, m)[source]

Set text rotation mode.

Parameters: m{None, 'default', 'anchor'}If None or "default", the text will be first rotated, then aligned according to their horizontal and vertical alignments. If "anchor", then alignment occurs before rotation.
set_size(self, fontsize)

Alias for set_fontsize.

set_stretch(self, stretch)

Alias for set_fontstretch.

set_style(self, fontstyle)

Alias for set_fontstyle.

set_text(self, s)[source]

Set the text string s.

It may contain newlines (\n) or math in LaTeX syntax.

Parameters: sobjectAny object gets converted to its str representation, except for None which is converted to an empty string.
set_transform_rotates_text(self, t)[source]

Whether rotations of the transform affect the text direction.

Parameters: tbool
set_usetex(self, usetex)[source]
Parameters: usetexbool or NoneWhether to render using TeX, None means to use rcParams["text.usetex"] (default: False).
set_va(self, align)

Alias for set_verticalalignment.

set_variant(self, variant)

Alias for set_fontvariant.

set_verticalalignment(self, align)[source]

Set the vertical alignment.

Parameters: align{'center', 'top', 'bottom', 'baseline', 'center_baseline'}
set_weight(self, weight)

Alias for set_fontweight.

set_wrap(self, wrap)[source]

Set whether the text can be wrapped.

Parameters: wrapbool

Notes

Wrapping does not work together with savefig(..., bbox_inches='tight') (which is also used internally by %matplotlib inline in IPython/Jupyter). The 'tight' setting rescales the canvas to accommodate all content and happens before wrapping.

set_x(self, x)[source]

Set the x position of the text.

Parameters: xfloat
set_y(self, y)[source]

Set the y position of the text.

Parameters: yfloat
update(self, kwargs)[source]

Update this artist's properties from the dict props.

Parameters: propsdict
update_bbox_position_size(self, renderer)[source]

Update the location and the size of the bbox.

This method should be used when the position and size of the bbox needs to be updated before actually drawing the bbox.

update_from(self, other)[source]

Copy properties from other to self.

zorder = 3
matplotlib.text.get_rotation(rotation)[source]

Return rotation normalized to an angle between 0 and 360 degrees.

Parameters: rotationfloat or {None, 'horizontal', 'vertical'}Rotation angle in degrees. None and 'horizontal' equal 0, 'vertical' equals 90. float