Unable to load docstring into "Help" pane for functions with certain decorators

Issue Report Checklist

• Searched the issues page for similar reports
• Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• Could not reproduce inside jupyter qtconsole (if console-related)
• Tried basic troubleshooting (if a bug/error)
  • Restarted Spyder
  • Reset preferences with spyder --reset
  • Reinstalled the latest version of Anaconda
  • Tried the other applicable steps from the Troubleshooting Guide
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

What steps reproduce the problem?

1. Install this library, typeguard (https://github.com/agronholm/typeguard) by pip install typeguard
2. Use the following script:

from typeguard import typechecked

@typechecked
def func(a: int):
    """
    Parameters
    ----------

    a : int
        Something.
    """
    print('someting')

b = func(3)

1. Move your cursor to func in the last line of the script, and press Ctrl + I (“inspect current object”).

What is the expected output? What do you see instead?

The docstring cannot be loaded into the “Help” pane.

However, if you comment out the line @typechecked, and then press Ctrl + I (with the cursor on func), you will be able to see the docstring correctly loaded.

Versions

• Spyder version: 4.0.0
• Python version: 3.7.3
• Qt version: 5.9.6
• PyQt version: 5.9.3
• Operating System name/version: Windows 10 and Ubuntu 18.04

Dependencies

cloudpickle >=0.5.0          :  1.2.2 (OK)
pygments >=2.0               :  2.4.2 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
sphinx >=0.6.6               :  2.2.1 (OK)
pylint >=0.25                :  2.4.4 (OK)
psutil >=0.3                 :  5.6.5 (OK)
qtawesome >=0.5.7            :  0.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
zmq >=17                     :  18.1.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
numpydoc >=0.6.0             :  0.9.1 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
qdarkstyle >=2.7             :  2.7 (OK)
atomicwrites >=1.2.0         :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
watchdog                     :  None (OK)
keyring                      :  None (OK)
pexpect >=4.4.0              :  4.7.0 (OK)
pympler                      :  None (OK)
sympy >=0.7.3                :  1.4 (OK)
cython >=0.21                :  0.29.14 (OK)
IPython >=4.0                :  7.9.0 (OK)
matplotlib >=2.0.0           :  3.0.3 (OK)
pandas >=0.13.1              :  0.25.3 (OK)
numpy >=1.7                  :  1.17.3 (OK)
scipy >=0.17.0               :  1.3.1 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.2 (OK)
rtree >=0.8.3                :  0.8.3 (OK)

[jsh9]

I upgraded Spyder to 4.1.4 (with Jedi 0.17.1), and this issue is solved. Thank you, Spyder developers!

[ccordoba12]

I’m really glad to hear this issue is finally solved for you.