Hi @Emmanuelle
Hope you are well.
I tried what you suggested for the px.Scatter_3D when uploading a document to plot a 3D plot. This exact code works with 2D px.Scatter but not px.Scatter_3D. Could you provide some guidance into why that may be the case. I get the error: ‘NoneType’ object has no attribute ‘split’
import base64
import io
import dash
from dash.dependencies import Input, Output, State
import dash_core_components as dcc
import dash_html_components as html
import pandas as pd
import plotly.express as px
import flask
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
server = flask.Flask(__name__)
app = dash.Dash(__name__, external_stylesheets=external_stylesheets, server=server)
app.layout = html.Div([
html.Div([dcc.Upload(
id='data-table-upload',
children=html.Div(['Drag and Drop or ',
html.A('Select Files')
]),
style={
'width': '70%',
'height': '60px',
'lineHeight': '60px',
'borderWidth': '1px',
'borderStyle': 'dashed',
'borderRadius': '5px',
'textAlign': 'center',
'margin': '10px 15%'
},
multiple=False
),
]),
html.Div([dcc.Graph(id='my-graph')], style={'display': 'inline-block', 'width': '70%', 'height': '75%'}),
html.Div([
html.Div([html.Label(["Select X variable:",
dcc.Dropdown(id='xaxis-3D', multi=False, placeholder="Select an option for X")],
className="six columns"
)], style={'width': '170%', 'display': 'inline-block'}),
html.Div([html.Label(["Select Y variable:",
dcc.Dropdown(id='yaxis-3D', multi=False, placeholder='Select an option for Y')],
className="six columns"
), ], style={'width': '170%', 'display': 'inline-block'}),
html.Div([html.Label(["Select Z variable:",
dcc.Dropdown(id='zaxis-3D', multi=False, placeholder='Select an option for Z')],
className="six columns"
), ], style={'width': '170%', 'display': 'inline-block'}),
html.Div([html.Label(
["Select Size variable:",
dcc.Dropdown(id='saxis-3D', multi=False, placeholder='Select an option for Size')],
className="six columns"
)], style={'width': '170%', 'display': 'inline-block'}),
html.Div([html.Label(
["Select Color variable:",
dcc.Dropdown(id="caxis-3D", multi=False, placeholder='Select an option for Color')],
className="six columns"
)], style={'width': '170%', 'display': 'inline-block'})
],
style={'display': 'inline-block', 'width': '23%', })
])
def parse_contents(contents, filename):
content_type, content_string = contents.split(',')
decoded = base64.b64decode(content_string)
try:
if 'csv' in filename:
# Assume that the user uploaded a CSV file
return pd.read_csv(
io.StringIO(decoded.decode('utf-8')))
elif 'xls' in filename:
# Assume that the user uploaded an excel file
return pd.read_excel(io.BytesIO(decoded))
elif 'txt' or 'tsv' in filename:
return pd.read_csv(
io.StringIO(decoded.decode('utf-8')), delimiter=r'\s+'
)
except Exception as e:
print(e)
return html.Div([
'There was an error processing this file.'
])
# POPULATE X AXIS DROPDOWN 3D
@app.callback(Output('xaxis-3D', 'options'),
[Input('data-table-upload', 'contents')],
[State('data-table-upload', 'filename')])
def populate_xaxis_dropdown(contents, filename):
df = parse_contents(contents, filename)
return [{'label': i, 'value': i} for i in df.columns]
# POPULATE Y AXIS DROPDOWN 3D
@app.callback(Output('yaxis-3D', 'options'),
[Input('data-table-upload', 'contents')],
[State('data-table-upload', 'filename')])
def populate_yaxis_dropdown(contents, filename):
df = parse_contents(contents, filename)
return [{'label': i, 'value': i} for i in df.columns]
# POPULATE Z AXIS DROPDOWN 3D
@app.callback(Output('zaxis-3D', 'options'),
[Input('data-table-upload', 'contents')],
[State('data-table-upload', 'filename')])
def populate_zaxis_dropdown(contents, filename):
df = parse_contents(contents, filename)
return [{'label': i, 'value': i} for i in df.columns]
# POPULATE C AXIS DROPDOWN 3D
@app.callback(Output('caxis-3D', 'options'),
[Input('data-table-upload', 'contents')],
[State('data-table-upload', 'filename')])
def populate_caxis_dropdown(contents, filename):
df = parse_contents(contents, filename)
return [{'label': i, 'value': i} for i in df.columns]
# POPULATE S AXIS DROPDOWN 3D
@app.callback(Output('saxis-3D', 'options'),
[Input('data-table-upload', 'contents')],
[State('data-table-upload', 'filename')])
def populate_saxis_dropdown(contents, filename):
df = parse_contents(contents, filename)
return [{'label': i, 'value': i} for i in df.columns]
@app.callback(Output('my-graph', 'figure'),
[Input('data-table-upload', 'contents'),
Input('xaxis-3D', 'value'),
Input('yaxis-3D', 'value'),
Input('zaxis-3D', 'value'),
Input('caxis-3D', 'value'),
Input('saxis-3D', 'value')],
[State('data-table-upload', 'filename')]
)
def make_figure(contents, x, y, z, color, size, filename):
df = parse_contents(contents, filename)
if x or y or z or color or size is None:
return dash.no_update
return px.scatter_3d(df, x=df[x], y=df[y], z=df[z], title="", animation_frame="Pressure (bar)",
animation_group=df.columns[0], size=df[size], color=df[color],
hover_name="DDEC code", color_continuous_scale='Viridis',
hover_data={}, template="plotly_white",
).update_xaxes(showgrid=False, title=x, autorange=True).update_yaxes(
showgrid=False, title=y, autorange=True).update_layout(
clickmode='event+select', hovermode='closest', margin={'l': 50, 'b': 80, 't': 50, 'r': 10}, autosize=True
).update_traces(marker=dict(opacity=0.7, showscale=True, line=dict(width=0.5, color='DarkSlateGrey'),
colorbar=dict(title=color)))
app.run_server(debug=True)