[Bug 1911002] [NEW] SyntaxWarning when importing tabulate using python3.8

[Thomas Cellerier]

Public bug reported:

The python3-tabulate package raises a SyntaxWarning when imported using
python3.8.

To work around this I use the following code for an internal CLI
application:


    import warnings
    with warnings.catch_warnings():
        # Ignore the following warning when importing the tabulate package:
        #     /usr/lib/python3/dist-packages/tabulate.py:196: SyntaxWarning: "is" with a literal. Did you mean "=="?
        #     if isinstance(val, (_text_type, _binary_type)) and val.strip() is "":
        warnings.simplefilter("ignore")
        from tabulate import tabulate


$ lsb_release -rd
Description:	Ubuntu 18.04.5 LTS
Release:	18.04


$ sudo apt install python3-tabulate
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  python3-tabulate
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 28,9 kB of archives.
After this operation, 127 kB of additional disk space will be used.
Get:1 http://se.archive.ubuntu.com/ubuntu bionic/universe amd64 python3-tabulate all 0.7.7-1 [28,9 kB]
Fetched 28,9 kB in 0s (90,5 kB/s)           
Selecting previously unselected package python3-tabulate.
(Reading database ... 314447 files and directories currently installed.)
Preparing to unpack .../python3-tabulate_0.7.7-1_all.deb ...
Unpacking python3-tabulate (0.7.7-1) ...
Setting up python3-tabulate (0.7.7-1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

$python3.8
Python 3.8.7 (default, Dec 21 2020, 20:10:35) 
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tabulate
/usr/lib/python3/dist-packages/tabulate.py:196: SyntaxWarning: "is" with a literal. Did you mean "=="?
  if isinstance(val, (_text_type, _binary_type)) and val.strip() is "":
>>> 

$ which python3.8
/usr/bin/python3.8
$ dpkg --list|grep python3.8
ii  libpython3.8:amd64                                    3.8.7-1+bionic1                                  amd64        Shared Python runtime library (version 3.8)
ii  libpython3.8-dev:amd64                                3.8.7-1+bionic1                                  amd64        Header files and a static library for Python (v3.8)
ii  libpython3.8-minimal:amd64                            3.8.7-1+bionic1                                  amd64        Minimal subset of the Python language (version 3.8)
ii  libpython3.8-stdlib:amd64                             3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (standard library, version 3.8)
ii  python3.8                                             3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (version 3.8)
ii  python3.8-dev                                         3.8.7-1+bionic1                                  amd64        Header files and a static library for Python (v3.8)
ii  python3.8-minimal                                     3.8.7-1+bionic1                                  amd64        Minimal subset of the Python language (version 3.8)
ii  python3.8-venv                                        3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (pyvenv binary, version 3.8)

** Affects: python-tabulate (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1911002

Title:
  SyntaxWarning when importing tabulate using python3.8

Status in python-tabulate package in Ubuntu:
  New

Bug description:
  The python3-tabulate package raises a SyntaxWarning when imported
  using python3.8.

  To work around this I use the following code for an internal CLI
  application:

  
      import warnings
      with warnings.catch_warnings():
          # Ignore the following warning when importing the tabulate package:
          #     /usr/lib/python3/dist-packages/tabulate.py:196: SyntaxWarning: "is" with a literal. Did you mean "=="?
          #     if isinstance(val, (_text_type, _binary_type)) and val.strip() is "":
          warnings.simplefilter("ignore")
          from tabulate import tabulate

  
  $ lsb_release -rd
  Description:	Ubuntu 18.04.5 LTS
  Release:	18.04

  
  $ sudo apt install python3-tabulate
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following NEW packages will be installed:
    python3-tabulate
  0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
  Need to get 28,9 kB of archives.
  After this operation, 127 kB of additional disk space will be used.
  Get:1 http://se.archive.ubuntu.com/ubuntu bionic/universe amd64 python3-tabulate all 0.7.7-1 [28,9 kB]
  Fetched 28,9 kB in 0s (90,5 kB/s)           
  Selecting previously unselected package python3-tabulate.
  (Reading database ... 314447 files and directories currently installed.)
  Preparing to unpack .../python3-tabulate_0.7.7-1_all.deb ...
  Unpacking python3-tabulate (0.7.7-1) ...
  Setting up python3-tabulate (0.7.7-1) ...
  Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

  $python3.8
  Python 3.8.7 (default, Dec 21 2020, 20:10:35) 
  [GCC 7.5.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import tabulate
  /usr/lib/python3/dist-packages/tabulate.py:196: SyntaxWarning: "is" with a literal. Did you mean "=="?
    if isinstance(val, (_text_type, _binary_type)) and val.strip() is "":
  >>> 

  $ which python3.8
  /usr/bin/python3.8
  $ dpkg --list|grep python3.8
  ii  libpython3.8:amd64                                    3.8.7-1+bionic1                                  amd64        Shared Python runtime library (version 3.8)
  ii  libpython3.8-dev:amd64                                3.8.7-1+bionic1                                  amd64        Header files and a static library for Python (v3.8)
  ii  libpython3.8-minimal:amd64                            3.8.7-1+bionic1                                  amd64        Minimal subset of the Python language (version 3.8)
  ii  libpython3.8-stdlib:amd64                             3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (standard library, version 3.8)
  ii  python3.8                                             3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (version 3.8)
  ii  python3.8-dev                                         3.8.7-1+bionic1                                  amd64        Header files and a static library for Python (v3.8)
  ii  python3.8-minimal                                     3.8.7-1+bionic1                                  amd64        Minimal subset of the Python language (version 3.8)
  ii  python3.8-venv                                        3.8.7-1+bionic1                                  amd64        Interactive high-level object-oriented language (pyvenv binary, version 3.8)

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