pydeck: PathLayer fails when input data contains a 0-length line

Description

When trying to create a path layer, if the dataframe contain a path location of x->y, where x and y have the same location, instead of “ignoring” that specific path, the entire layer is corrupted. It will cause the paths in the layer to act as one path.

Repro Steps

In order to reproduce, i just used the example of the path layer, and change the path location of one item:

import pydeck
import pandas as pd

DATA_URL = "https://raw.githubusercontent.com/visgl/deck.gl-data/master/website/bart-lines.json"
df = pd.read_json(DATA_URL)


def hex_to_rgb(h):
    h = h.lstrip("#")
    return tuple(int(h[i : i + 2], 16) for i in (0, 2, 4))


df["color"] = df["color"].apply(hex_to_rgb)

**df['path'][0] = [[0, 1], [0, 1]]**

view_state = pydeck.ViewState(latitude=37.782556, longitude=-122.3484867, zoom=10)

layer = pydeck.Layer(
    type="PathLayer",
    data=df,
    pickable=True,
    get_color="color",
    width_scale=20,
    width_min_pixels=2,
    get_path="path",
    get_width=5,
)

r = pydeck.Deck(layers=[layer], initial_view_state=view_state, tooltip={"text": "{name}"})
r.to_html("path_layer.html",open_browser=True, notebook_display=False)

[Pessimistress]

Fixed in deck.gl@8.2.3.

[ajduberstein]

Fixed in pydeck 0.4–thank you @Pessimistress!

Both examples for the code above.

pydeck 0.3.1 (locked to deck.gl 8.1)

pydeck 0.4.0 (locked to deck.gl 8.2)