SSL Certificate Issue in Dash Tutorial

Dash Python
1

Currently working through the Dash tutorials as new to both python and Plotly Dash.

After completing two other Dash tutorials successful, I have run into a SSL issue after having produced an exact copy of the tutorial text. The url referenced in the tutorial with the data exists, as I have checked.

The tutorial is “Part 2 Dash Layout - Reusable Components - generates a Table from a Pandas dataframe”. Part 2. Layout | Dash for Python Documentation | Plotly

My tutorial attempt produced a long error message terminating with:
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1108)>

Consulted the Plotly Community Forum for previous SSL issues. The two proposed solutions were offered in a post, but can’t get either to work (one of these is proposed below).

import os
os.environ[‘REQUESTS_CA_BUNDLE’] = ‘path to cer’

Any other ideas? (Using Pycharm).

2

Without knowing the exact line / command that causes you the error, or the full traceback, it is difficult to debug.

Stackoverflow has this: urllib and “SSL: CERTIFICATE_VERIFY_FAILED” Error question which looks related and has a few answers, and so does this SSL: CERTIFICATE_VERIFY_FAILED with Python3.

One thing that you could try to do is to update your certifi package using pip.

4

Hi @Korach,

  1. I checked the tracebacks you gave. As I assumed, there is no dash involved in the exception chain which means it is not related to dash itself, but your python code (or configuration) in general. I assume you’ll get similar error messages with just running the snippet below, or, in fact, when trying to connect to any https:// address using python. This would mean that the SSL configuration of your python installation is somehow incomplete or erroneous. Your code might actually run just fine if you replace https:// with http:// (if the script does not ty to connect any other https:// addresses.
import pandas as pd
df = pd.read_csv('https://gist.githubusercontent.com/chriddyp/c78bf172206ce24f77d6363a2d754b59/raw/c353e8ef842413cae56ae3920b8fd78468aa4cb2/usa-agricultural-exports-2011.csv')
  1. Maybe someone else could comment this but in my opinion this is in-topic since you are experiencing issues while following a Dash tutorial. Someone else with the same problem might find this helpful. If you think it is helpful, you can also post a SO question.
  2. It is nice to hear you are learning both python and dash, and good that you have found a tutorial to follow. I think it is good if you post here / and or StackOverflow a question about any problems you are facing, since those might help others. I personally don’t wish emails for support requests, since I am not working for Dash/plotly/python, but am just a ordinary person like you, trying to learn about python amongst other things, although I like to help whenever I have some spare time :slight_smile:

Regarding to your SSL problem, did you find anything new? I see you have probably a Mac (I have Windows) machine, and some version of Python 3.8. If you still have the problem I found two possible solutions: this and this. Perhaps one of them helps you to find a way to solve the issue?