Implement the frame='none' syntax for no frames

examples/gallery/maps/choropleth_map.py

@@ -27,7 +27,7 @@
 africa = world[world["CONTINENT"] == "Africa"].copy()
 
 fig = pygmt.Figure()
-fig.basemap(region=[-19.5, 53, -37.5, 38], projection="M10c", frame="+n")
+fig.basemap(region=[-19.5, 53, -37.5, 38], projection="M10c", frame="none")
 
 # First, we define the colormap to fill the polygons based on the "POP_EST" column.
 pygmt.makecpt(cmap="SCM/acton", series=(0, 100), reverse=True)

pygmt/alias.py

@@ -338,7 +338,9 @@ def add_common(self, **kwargs):  # noqa: PLR0912
         for key, value in kwargs.items():
             match key:
                 case "B":
-                    alias = Alias(value, name="frame")
+                    # Mapping frame="none" to '-B+n'.
+                    _value = "+n" if value == "none" else value
+                    alias = Alias(_value, name="frame")
                 case "J":
                     alias = Alias(value, name="projection")
                 case "R":

pygmt/helpers/decorators.py

@@ -90,9 +90,12 @@
             that do not match the pattern. Append **i** for case insensitive
             matching. This does not apply to headers or segment headers.""",
     "frame": r"""
-        frame : bool, str, or list
-            Set map boundary
-            :doc:`frame and axes attributes </tutorials/basics/frames>`.""",
+        frame
+            Set frame and axes attributes for the plot. It can be a bool, a string, or
+            a list of strings. If ``frame=True``, frame will be drawn with the default
+            attributes. If ``frame="none"``, no frame will be drawn. A tutorial is
+            available at :doc:`frame and axes attributes </tutorials/basics/frames>`.
+            Full documentation is at :gmt-docs:`gmt.html#b-full`.""",
     "gap": r"""
         gap : str or list
             **x**\|\ **y**\|\ **z**\|\ **d**\|\ **X**\|\ **Y**\|\

pygmt/src/basemap.py

@@ -18,7 +18,7 @@ def basemap(  # noqa: PLR0913
     zscale: float | str | None = None,
     zsize: float | str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     map_scale: str | None = None,

pygmt/src/coast.py

@@ -30,7 +30,7 @@ def coast(  # noqa: PLR0913
     box: Box | bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/colorbar.py

@@ -168,7 +168,7 @@ def colorbar(  # noqa: PLR0913
     scale: float | None = None,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,
@@ -322,7 +322,8 @@ def colorbar(  # noqa: PLR0913
     $projection
     $region
     frame
-        Set colorbar boundary frame, labels, and axes attributes.
+        Set colorbar boundary frame, labels, and axes attributes. If set to ``"none"``,
+        then no frame will be drawn.
     $verbose
     $panel
     $perspective

pygmt/src/contour.py

@@ -40,7 +40,7 @@ def contour(  # noqa: PLR0913
     no_clip: bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/grdcontour.py

@@ -40,7 +40,7 @@ def grdcontour(
     grid: PathLike | xr.DataArray,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/grdimage.py

@@ -32,7 +32,7 @@ def grdimage(  # noqa: PLR0913
     no_clip: bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/grdview.py

@@ -135,7 +135,7 @@ def grdview(  # noqa: PLR0913
     zscale: float | str | None = None,
     zsize: float | str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/histogram.py

@@ -49,7 +49,7 @@ def histogram(  # noqa: PLR0913
     bar_offset: float | str | None = None,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/image.py

@@ -28,7 +28,7 @@ def image(  # noqa: PLR0913
     invert: bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/legend.py

@@ -27,7 +27,7 @@ def legend(  # noqa: PLR0913
     scale: float | None = None,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/meca.py

@@ -148,7 +148,7 @@ def meca(  # noqa: PLR0913
     event_name: str | Sequence[str] | None = None,
     no_clip: bool = False,
     projection: str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     region: Sequence[float | str] | str | None = None,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,

pygmt/src/plot.py

@@ -53,7 +53,7 @@ def plot(  # noqa: PLR0912, PLR0913
     straight_line: bool | Literal["x", "y"] = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/plot3d.py

@@ -55,7 +55,7 @@ def plot3d(  # noqa: PLR0912, PLR0913
     zscale: float | str | None = None,
     zsize: float | str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/rose.py

@@ -40,7 +40,7 @@ def rose(  # noqa: PLR0913
     length=None,
     azimuth=None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/solar.py

@@ -23,7 +23,7 @@ def solar(  # noqa: PLR0913
     pen: str | None = None,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/subplot.py

@@ -145,7 +145,7 @@ def subplot(  # noqa: PLR0913
     margins: float | str | Sequence[float | str] | None = None,
     title: str | None = None,
     projection: str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     region: Sequence[float | str] | str | None = None,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,

pygmt/src/ternary.py

@@ -20,7 +20,7 @@ def ternary(  # noqa: PLR0913
     blabel: str | None = None,
     clabel: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/text.py

@@ -47,7 +47,7 @@ def text_(  # noqa: PLR0912, PLR0913
     no_clip: bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/tilemap.py

@@ -31,7 +31,7 @@ def tilemap(  # noqa: PLR0913
     monochrome: bool = False,
     no_clip: bool = False,
     projection: str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/velo.py

@@ -41,7 +41,7 @@ def velo(  # noqa : PLR0913
     no_clip: bool = False,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/src/wiggle.py

@@ -47,7 +47,7 @@ def wiggle(  # noqa: PLR0913
     negative_fill: str | None = None,
     projection: str | None = None,
     region: Sequence[float | str] | str | None = None,
-    frame: str | Sequence[str] | bool = False,
+    frame: str | Sequence[str] | Literal["none"] | bool = False,
     verbose: Literal["quiet", "error", "warning", "timing", "info", "compat", "debug"]
     | bool = False,
     panel: int | Sequence[int] | bool = False,

pygmt/tests/baseline/test_basemap_frame_none.png.dvc

@@ -0,0 +1,5 @@
+outs:
+- md5: fda939936894cb72a785ecf7e1f42488
+  size: 7252
+  hash: md5
+  path: test_basemap_frame_none.png

pygmt/tests/test_alias_system.py

@@ -23,15 +23,15 @@ def func(
     A simple function to test the alias system.
     """
     aliasdict = AliasSystem(
-        R=Alias(region, name="region", sep="/", size=[4, 6]),
-        B=Alias(frame, name="frame"),
         U=[
             Alias(label, name="label"),
             Alias(text, name="text", prefix="+t"),
             Alias(offset, name="offset", prefix="+o", sep="/"),
         ],
     ).add_common(
+        B=frame,
         J=projection,
+        R=region,
         V=verbose,
         c=panel,
     )
@@ -100,9 +100,18 @@ def test_alias_system_multiple_aliases_short_form():
         func(text="efg", U="efg")
 
 
+def test_alias_system_common_parameter_frame():
+    """
+    Test that the alias system works with the 'frame' parameter.
+    """
+    assert func(frame="WSen") == ["-BWSen"]
+    assert func(frame=["WSen", "xaf", "yaf"]) == ["-BWSen", "-Bxaf", "-Byaf"]
+    assert func(frame="none") == ["-B+n"]
+
+
 def test_alias_system_common_parameter_verbose():
     """
-    Test that the alias system works with common parameters.
+    Test that the alias system works with the 'verbose' parameter.
     """
     # Test the verbose parameter.
     assert func(verbose="quiet") == ["-Vq"]

pygmt/tests/test_basemap.py

@@ -155,3 +155,17 @@ def test_basemap_frame_sequence_true():
     fig = Figure()
     fig.basemap(region=[0, 10, 0, 10], projection="X10c", frame=[True, "WSen"])
     return fig
+
+
+@pytest.mark.mpl_image_compare
+def test_basemap_frame_none():
+    """
+    Test that passing frame="none" works.
+    """
+    fig = Figure()
+    fig.basemap(region=[0, 5, 0, 2], projection="X5c/2c", frame=True)
+    fig.colorbar(cmap="google/turbo", frame=True)
+    fig.shift_origin(xshift=5.5)
+    fig.basemap(region=[0, 5, 0, 2], projection="X5c/2c", frame="none")
+    fig.colorbar(cmap="google/turbo", frame="none")
+    return fig