import plotly.express as px

ys = []
xs = []

with open("data.txt") as file:
    for line in file.readlines():
        print(line)
        try:
            y, x = map(float, line.split(" "))
        except Exception as e:
            print(e)
        ys.append(y)
        xs.append(x)

fig = px.scatter(
    x=xs,
    y=ys,
    labels=dict(
        x="connected at (s)",
        y="connection number",
    ),
)
fig.show()