Hello,

some years ago I plotted a lattice using JavaScript that looks like this:

I used this code:

I donâ€™t need the picture as a pdf but I need the code in Python.

How is the code translated into Python?

Hello,

some years ago I plotted a lattice using JavaScript that looks like this:

I used this code:

I donâ€™t need the picture as a pdf but I need the code in Python.

How is the code translated into Python?

Hi @Corin19,

The Python code can avoid the javascript multiple tests for probabilities and node positions, using numpy:

```
import numpy as np
import plotly.graph_objects as go
def grid(m, n):
y, x = np.indices((m, n))
return x, y
def set_edges(x, y, p_given=0.5):
if x.shape != y.shape:
raise ValueError('x and y should have the same shape')
m, n = x.shape
I, J = np.where(np.random.rand(m-1, n-1)>=p_given)
K, L = np.where(np.random.rand(m-1, n-1)>=p_given)
x_edges = []
y_edges = []
for i, j in zip(I, J):
x_edges.extend([x[i,j], x[i, j+1], None])
y_edges.extend([y[i,j], y[i,j], None])
for k, l in zip(K,L):
x_edges.extend([x[k,l], x[k, l], None])
y_edges.extend([y[k,l], y[k+1, l], None])
return x_edges, y_edges
x, y = grid(12, 12)
nodes = go.Scatter(name='node',
x=x.flatten(),
y=y.flatten(),
mode='markers',
marker_size=7,
marker_color='black')
x_edges, y_edges = set_edges(x, y, p_given=0.8)
edge_trace = go.Scatter(name='edge',
x=x_edges,
y=y_edges,
mode='lines',
line_width=2,
line_color='black')
fig = go.Figure(data=[edge_trace, nodes])
fig.update_layout(width=500, height=500, template='none', xaxis_visible=False, yaxis_visible=False)
fig.show()
```

Hi @empet, thank you so much for your answer!

Somehow I get this error:

Do you know what I have to do to avoid this error?

Thank you!

@Corin19 Here is Plotly forum. Have you worked with Plotly before?

For the first install:

```
pip install plotly
```

otherwise

```
pip install plotly --upgrade
```