BUG: Accept list-like color with single col in plot (#16233)

Closes #3486

Author: TomAugspurger

doc/source/whatsnew/v0.20.2.txt

@@ -55,6 +55,8 @@ I/O
 Plotting
 ^^^^^^^^
 
+- Bug in ``DataFrame.plot`` with a single column and a list-like ``color`` (:issue:`3486`)
+
 
 
 

pandas/plotting/_core.py

@@ -180,7 +180,8 @@ def _validate_color_args(self):
  colors = self.kwds.pop('colors')
  self.kwds['color'] = colors
 
- if ('color' in self.kwds and self.nseries == 1):
+ if ('color' in self.kwds and self.nseries == 1 and
+ not is_list_like(self.kwds['color'])):
  # support series.plot(color='green')
  self.kwds['color'] = [self.kwds['color']]
 

pandas/tests/plotting/test_frame.py

@@ -153,6 +153,11 @@ def test_mpl2_color_cycle_str(self):
  else:
  pytest.skip("not supported in matplotlib < 2.0.0")
 
+ def test_color_single_series_list(self):
+ # GH 3486
+ df = DataFrame({"A": [1, 2, 3]})
+ _check_plot_works(df.plot, color=['red'])
+
  def test_color_empty_string(self):
  df = DataFrame(randn(10, 2))
  with pytest.raises(ValueError):