Plotly在Spyder(Python 3.5)不显示图表及热力图代码运行问题

Hey there! Let's work through the two main issues you're facing: getting your Plotly heatmap code up and running, and getting it to display properly in Spyder.

1. Fixing Your Plotly Code & Account Setup #

First, let's sort out your code. A couple key points to note:

• Newer Plotly versions (v4+) let you run plots offline without an account—this is often simpler for beginners who just want to generate local charts.
• If you do want to use your online Plotly account, you need to properly configure your credentials and finish the incomplete code.

Option 1: Offline Mode (No Account Required) #

This is the easiest way to get started. Adjust your code like this:

import plotly.graph_objs as go
from plotly.offline import plot, init_notebook_mode, iplot

# Create your heatmap trace
trace = go.Heatmap(z=[[1, 20, 30],[20, 1, 60],[30, 60, 1]])
data = [trace]

# Option A: Generate an HTML file that opens in your default browser
plot(data, filename='local_heatmap.html')

# Option B: Try inline rendering in Spyder (we'll tweak this more below)
init_notebook_mode(connected=True)
iplot(data)

Option 2: Online Mode (With Your Plotly Account) #

If you want to save plots to your online account, uncomment the credentials line and complete the py.plot() call:

import plotly
# Uncomment and use your actual account details
plotly.tools.set_credentials_file(username='julirov', api_key='your_real_api_key_here')
import plotly.plotly as py
import plotly.graph_objs as go

trace = go.Heatmap(z=[[1, 20, 30],[20, 1, 60],[30, 60, 1]])
data = [trace]

# This saves the plot to your Plotly account and opens it in the browser
py.plot(data, filename='online_heatmap')

2. Getting Plotly Charts to Display in Spyder #

Spyder has some specific rendering quirks—try these fixes one by one:

Fix 1: Force Plotly to Use Spyder-Compatible Renderer #

Add these lines at the top of your script to set the correct renderer:

import plotly.io as pio
# Try 'spyder' first; if that fails, use 'inline'
pio.renderers.default = 'spyder'

Fix 2: Adjust Spyder's Graphics Backend #

1. Open Spyder, go to Tools > Preferences > IPython Console > Graphics
2. Under "Backend", select Qt5 or Automatic (Qt5 is usually more reliable for Plotly)
3. Restart Spyder to apply the change

Fix 3: Fallback to Browser Display #

If inline rendering still doesn't work, use the offline plot() function from Option 1 above—it generates an HTML file and opens it in your default browser, which should always work.

内容的提问来源于stack exchange，提问作者Julian Rovner