Sage 9.0 has some errors.

[罗红文]

~$ sage 

┌────────────────────────────────────────────────────────────────────┐

│ SageMath version 9.0, Release Date: 2020-01-01                     │

│ Using Python 3.8.6. Type "help()" for help.                        │

└────────────────────────────────────────────────────────────────────┘

Traceback (most recent call last):

  File "/usr/share/sagemath/bin/sage-ipython", line 12, in <module>

    from sage.repl.interpreter import SageTerminalApp

  File "/usr/lib/python3/dist-packages/sage/repl/interpreter.py", line 105, in <module>

    from sage.repl.preparse import preparse, containing_block

  File "/usr/lib/python3/dist-packages/sage/repl/preparse.py", line 227, in <module>

    from sage.repl.load import load_wrap

  File "/usr/lib/python3/dist-packages/sage/repl/load.py", line 19, in <module>

    from sage.cpython.string import str_to_bytes, bytes_to_str, FS_ENCODING

ModuleNotFoundError: No module named 'sage.cpython.string'

~$ uname -a

Linux lhw 5.8.0-19-generic #20-Ubuntu SMP Fri Sep 11 09:08:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[Dima Pasechnik]

Thanks for the report. It is an Ubuntu bug, to be reported to then ---
we here don't do packaging for Ubuntu.

Best
Dima

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