Linestyles

https://matplotlib.org/3.1.0/gallery/lines_bars_and_markers/linestyles.html

from matplotlib import lines
lines.lineStyles.keys()

['', ' ', 'None', '--', '-.', '-', ':']

You can copy the dictionary from the Linestyle example:

from collections import OrderedDict

linestyles = OrderedDict(
    [('solid',               (0, ())),
     ('loosely dotted',      (0, (1, 10))),
     ('dotted',              (0, (1, 5))),
     ('densely dotted',      (0, (1, 1))),

     ('loosely dashed',      (0, (5, 10))),
     ('dashed',              (0, (5, 5))),
     ('densely dashed',      (0, (5, 1))),

     ('loosely dashdotted',  (0, (3, 10, 1, 10))),
     ('dashdotted',          (0, (3, 5, 1, 5))),
     ('densely dashdotted',  (0, (3, 1, 1, 1))),

     ('loosely dashdotdotted', (0, (3, 10, 1, 10, 1, 10))),
     ('dashdotdotted',         (0, (3, 5, 1, 5, 1, 5))),
     ('densely dashdotdotted', (0, (3, 1, 1, 1, 1, 1)))])

You can then iterate over the linestyles

fig, ax = plt.subplots()

X, Y = np.linspace(0, 100, 10), np.zeros(10)
for i, (name, linestyle) in enumerate(linestyles.items()):
    ax.plot(X, Y+i, linestyle=linestyle, linewidth=1.5, color='black')

ax.set_ylim(-0.5, len(linestyles)-0.5)

plt.show()

Or you just take a single linestyle out of those,

ax.plot([0,100], [0,1], linestyle=linestyles['loosely dashdotdotted'])