small fixes

Author: nschloe

src/tikzplotlib/_axes.py

@@ -771,7 +771,7 @@ def _handle_listed_color_map(cmap, data):
         reps = int(float(cmap.N) / len(cmap.colors) - 0.5) + 1
         repeated_cols = reps * cmap.colors
         colors = [
-            "rgb({k}{unit})=({rgb[0]:{ff}},{rgb[1]:{ff}},{rgb[2]:{ff}})"
+            f"rgb({k}{unit})=({rgb[0]:{ff}},{rgb[1]:{ff}},{rgb[2]:{ff}})"
             for k, rgb in enumerate(repeated_cols[: cmap.N])
         ]
     colormap_string = "{{mymap}}{{[1{}]\n {}\n}}".format(unit, ";\n  ".join(colors))

src/tikzplotlib/_hatches.py

@@ -1,12 +1,12 @@
 r"""
-    Map matplotlib hatches to tikz patterns
+Map matplotlib hatches to tikz patterns
 
-    For matplotlib hatches, see:
-    https://matplotlib.org/3.1.1/gallery/shapes_and_collections/hatch_demo.html
+For matplotlib hatches, see:
+https://matplotlib.org/3.1.1/gallery/shapes_and_collections/hatch_demo.html
 
-    For patterns in tikzpgf:
-    Ch 26 Pattern Lbrary in the manual
-    Requires \usetikzlibrary{patterns}
+For patterns in tikzpgf:
+Ch 26 Pattern Lbrary in the manual
+Requires \usetikzlibrary{patterns}
 """
 
 # These methods exist, and might be relevant (in the future?):
@@ -93,7 +93,7 @@ def _mpl_hatch2pgfp_pattern(data, hatch, color_name, color_rgba):
     try:
         pgfplots_pattern = _MP_HATCH2PGF_PATTERN[hatch]
     except KeyError:
-        warnings.warn("tikzplotlib: The hatch", hatch, "is ignored.")
+        warnings.warn(f"tikzplotlib: The hatch {hatch} is ignored.")
         return data, []
 
     data["tikz libs"].add("patterns")

src/tikzplotlib/_save.py

@@ -268,20 +268,16 @@ def _tex_comment(comment):
 
 def _get_color_definitions(data):
     """Returns the list of custom color definitions for the TikZ file."""
-    definitions = []
     ff = data["float format"]
-    for name, rgb in data["custom colors"].items():
-        definitions.append(
-            f"\\definecolor{{{name}}}{{rgb}}"
-            f"{{{rgb[0]:{ff}},{rgb[1]:{ff}},{rgb[2]:{ff}}}}"
-        )
-    return definitions
+    return [
+        f"\\definecolor{{{name}}}{{rgb}}{{{rgb[0]:{ff}},{rgb[1]:{ff}},{rgb[2]:{ff}}}}"
+        for name, rgb in data["custom colors"].items()
+    ]
 
 
 def _print_pgfplot_libs_message(data):
     """Prints message to screen indicating the use of PGFPlots and its
     libraries."""
-
     print(70 * "=")
     print("Please add the following lines to your LaTeX preamble:\n")
     print(data["flavor"].preamble(data))