self.contains_transaction: bool = False ^ SyntaxError: invalid syntax

[drandreaskrueger]

Hey!

Very happy to find your library.

However, when installing, I encountered this error:

python3 ./setup.py install

/usr/lib/python3.5/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
  warnings.warn(msg)
running install
running bdist_egg
running egg_info
writing top-level names to scalecodec.egg-info/top_level.txt
writing requirements to scalecodec.egg-info/requires.txt
writing scalecodec.egg-info/PKG-INFO
writing dependency_links to scalecodec.egg-info/dependency_links.txt
reading manifest file 'scalecodec.egg-info/SOURCES.txt'
writing manifest file 'scalecodec.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-x86_64/egg
running install_lib
running build_py
creating build/bdist.linux-x86_64/egg
creating build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/exceptions.py -> build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/types.py -> build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/block.py -> build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/base.py -> build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/metadata.py -> build/bdist.linux-x86_64/egg/scalecodec
copying build/lib/scalecodec/__init__.py -> build/bdist.linux-x86_64/egg/scalecodec
byte-compiling build/bdist.linux-x86_64/egg/scalecodec/exceptions.py to exceptions.cpython-35.pyc
byte-compiling build/bdist.linux-x86_64/egg/scalecodec/types.py to types.cpython-35.pyc
byte-compiling build/bdist.linux-x86_64/egg/scalecodec/block.py to block.cpython-35.pyc
  File "build/bdist.linux-x86_64/egg/scalecodec/block.py", line 43
    self.contains_transaction: bool = False
                             ^
SyntaxError: invalid syntax

byte-compiling build/bdist.linux-x86_64/egg/scalecodec/base.py to base.cpython-35.pyc
byte-compiling build/bdist.linux-x86_64/egg/scalecodec/metadata.py to metadata.cpython-35.pyc
byte-compiling build/bdist.linux-x86_64/egg/scalecodec/__init__.py to __init__.cpython-35.pyc
creating build/bdist.linux-x86_64/egg/EGG-INFO
copying scalecodec.egg-info/PKG-INFO -> build/bdist.linux-x86_64/egg/EGG-INFO
copying scalecodec.egg-info/SOURCES.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying scalecodec.egg-info/dependency_links.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying scalecodec.egg-info/requires.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
copying scalecodec.egg-info/top_level.txt -> build/bdist.linux-x86_64/egg/EGG-INFO
zip_safe flag not set; analyzing archive contents...
creating 'dist/scalecodec-0.1.0-py3.5.egg' and adding 'build/bdist.linux-x86_64/egg' to it
removing 'build/bdist.linux-x86_64/egg' (and everything under it)
Processing scalecodec-0.1.0-py3.5.egg
Removing /env/lib/python3.5/site-packages/scalecodec-0.1.0-py3.5.egg
Copying scalecodec-0.1.0-py3.5.egg to /env/lib/python3.5/site-packages
scalecodec 0.1.0 is already the active version in easy-install.pth

Installed /env/lib/python3.5/site-packages/scalecodec-0.1.0-py3.5.egg
Processing dependencies for scalecodec==0.1.0
Searching for more-itertools==7.0.0
Best match: more-itertools 7.0.0
Adding more-itertools 7.0.0 to easy-install.pth file

Using /env/lib/python3.5/site-packages
Finished processing dependencies for scalecodec==0.1.0

Thanks

[arjanz]

We removed the type hinting for compatibility, this is supporting since Python 3.5. Most likely it will now work with your version of Python 3

[drandreaskrueger]

Thanks a lot. Wow. That caused a long detour now:

There is a new Debian 10.2 now, so I dist-upgraded from Debian 9 - to then have python 3.7.

Also to work with your other library, because hashlib had no blake2b in python 3.5 ?!!

And wow, that 9-->10-upgrade has cost me nerves yesterday. And a whole day. But now I am a proud "Debian Buster" user, and can happily play with python 3.7.3. Good.

Idea: Is there a good automated way that you can always test your libraries whether they really run with all those versions?

Thanks.