ValueError: invalid literal for int() with base 10: b''

[k78872]

Description

What steps will reproduce the problem?

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

Please provide any additional information below

File "/anaconda3/lib/python3.6/site-packages/spyder/plugins/maininterpreter.py", line 162, in python_executable_switched
self.warn_python_compatibility(cust_pyexec)
File "/anaconda3/lib/python3.6/site-packages/spyder/plugins/maininterpreter.py", line 171, in warn_python_compatibility
console_version = int(proc.communicate()[0])
ValueError: invalid literal for int() with base 10: b''

Version and main components

• Spyder Version: 3.2.3
• Python Version: 3.6.2
• Qt Versions: 5.6.2, PyQt5 5.6 on Darwin

Dependencies

pyflakes >=0.6.0 :  1.5.0 (OK)
pycodestyle >=2.3:  2.3.1 (OK)
pygments >=2.0   :  2.2.0 (OK)
pandas >=0.13.1  :  0.20.3 (OK)
numpy >=1.7      :  1.13.3 (OK)
sphinx >=0.6.6   :  1.6.3 (OK)
rope >=0.9.4     :  0.10.5 (OK)
jedi >=0.9.0     :  0.10.2 (OK)
psutil >=0.3     :  5.2.2 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
sympy >=0.7.3    :  1.1.1 (OK)
cython >=0.21    :  0.26.1 (OK)
qtconsole >=4.2.0:  4.3.1 (OK)
IPython >=4.0    :  6.1.0 (OK)
pylint >=0.25    :  1.7.2 (OK)

[Jeroendevr]

ValueError: invalid literal for int() with base 10: b'' Gives me a hint that a certain calculation is done using Log, Ln or Exp which is not correctly entered. Can you verify if this is the case?

[ccordoba12]

Thanks for reporting. We'll take a look at this in a future release.

[Jeroendevr]

What also could be the case is that you are using an int() function on an empty string?
For example the following gives also the same error:

a = ""
int(a)

[csabella]

This error occurred when you tried to change the Python interpreter in the preferences. Spyder tried to send code to the interpreter to get which version of Python it was using and instead didn't get an answer back. @k78872, what interpreter were you trying to change to? Do you get the same error every time you try to change to that interpreter or did this just happen one time?

Thanks!