pyls-mypy messages are not displayed correctly in some cases

Related to #3045

Problem Description

Some error messages from pyls-mypy are not displayed correctly. In general it happens for complicated error messages including generic types like List[T]. As far as I can see the output form pyls-mypy is correct and contains correct string.

What steps reproduce the problem?

1. Install pyls-mypy using pip

2. Type the following code in spyder and observe the reported code analysis message :

from typing import List

def f(*arg : List[float]) -> float:

    a1,a2 = arg

    return a1*a2

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

Expected output is:

Incompatible return value type (got "List[float]", expected "float")

What I see is just the end of that msg:

", expected "float")

Versions

• Spyder version: 4.0.0
• Python version: 3.7.3
• Qt version: 5.12.5
• PyQt version: 5.12.3
• Operating System name/version: Windows 10

Dependencies

cloudpickle >=0.5.0          :  1.2.2 (OK)
pygments >=2.0               :  2.5.2 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
sphinx >=0.6.6               :  2.3.0 (OK)
pylint >=0.25                :  2.4.4 (OK)
psutil >=0.3                 :  5.6.7 (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                     :  18.1.1 (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                :  None (NOK)
cython >=0.21                :  None (NOK)
IPython >=4.0                :  7.10.2 (OK)
matplotlib >=2.0.0           :  None (NOK)
pandas >=0.13.1              :  None (NOK)
numpy >=1.7                  :  None (NOK)
scipy >=0.17.0               :  None (NOK)
pyls >=0.31.2;<0.32.0        :  0.31.2 (OK)
rtree >=0.8.3                :  0.9.3 (OK)

[Richardk2n]

Changing lines 2504 - 2506

if '[' in msg and ']' in msg:
                # Remove extra redundant info from pyling messages
                msg = msg.split(']')[-1]

To something like

if src == 'pylint' and '[' in msg and ']' in msg:
                # Remove extra redundant info from pyling messages
                msg = msg.split(']')[-1]

should do the trick imho.

[Richardk2n]

spyder/plugins/editor/widgets/codeeditor.py line 2506 is msg = msg.split(']')[-1] Might be the cause of the problem.

If you want a quick and easy workaround insert a msg.replace("]", "]") into your pyls_mypy/plugin.py