Could not initialize mbed project

[Python380]

I am unable to initialize project for the y5 nrf51822 mbug.

I am using a AMD Ryzen 5500U, with Windows and VSCode, Platform Mbed.
The error message I get:

PIO Core Call Error: "Resolving nrf51_mkit environment packages...\r\nAlready up-to-date.\r\nResolving nrf51822_y5_mbug environment packages...\r\nAlready up-to-date.\r\nUpdating metadata for the vscode IDE...\r\n\n\nError: Processing nrf51822_y5_mbug (platform: nordicnrf51; board: nrf51822_y5_mbug; framework: mbed)\r\n--------------------------------------------------------------------------------\r\nVerbose mode can be enabled via -v, --verbose option\r\nCONFIGURATION: https://docs.platformio.org/page/boards/nordicnrf51/nrf51822_y5_mbug.html\r\nPLATFORM: Nordic nRF51 (8.1.0) > y5 nRF51822 mbug\r\nHARDWARE: NRF51822 16MHz, 16KB RAM, 256KB Flash\r\nDEBUG: Current (cmsis-dap) On-board (cmsis-dap) External (blackmagic, jlink, stlink)\r\nPACKAGES: \r\n - framework-mbed @ 5.51105.190312 (5.11.5) \r\n - tool-sreccat @ 1.164.0 (1.64) \r\n - toolchain-gccarmnoneeabi @ 1.70201.0 (7.2.1)\r\nAttributeError: type object 'array.array' has no attribute 'tostring':\r\n File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\main.py", line 184:\r\n env.SConscript("$BUILD_SCRIPT")\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:\r\n return _SConscript(self.fs, *files, **subst_kw)\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:\r\n exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)\r\n File "C:\Users\henri\.platformio\platforms\nordicnrf51\builder\main.py", line 116:\r\n target_elf = env.BuildProgram()\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:\r\n return self.method(*nargs, **kwargs)\r\n File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 63:\r\n env.ProcessProgramDeps()\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:\r\n return self.method(*nargs, **kwargs)\r\n File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 126:\r\n env.BuildFrameworks(env.get("PIOFRAMEWORK"))\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:\r\n return self.method(*nargs, **kwargs)\r\n File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 346:\r\n SConscript(env.GetFrameworkScript(f), exports="env")\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 660:\r\n return method(*args, **kw)\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:\r\n return _SConscript(self.fs, *files, **subst_kw)\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:\r\n exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)\r\n File "C:\Users\henri\.platformio\platforms\nordicnrf51\builder\frameworks\mbed.py", line 35:\r\n SConscript(\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 660:\r\n return method(*args, **kw)\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:\r\n return _SConscript(self.fs, *files, **subst_kw)\r\n File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:\r\n exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)\r\n File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\platformio-build.py", line 40:\r\n from pio_mbed_adapter import PlatformioMbedAdapter\r\n File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\pio_mbed_adapter.py", line 23:\r\n from tools.build_api import (prepare_toolchain, merge_region_list,\r\n File "C:\Users\henri\.platformio\packages\framework-mbed\tools\build_api.py", line 30:\r\n from intelhex import IntelHex\r\n File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\package_deps\py3\intelhex\init.py", line 44:\r\n from intelhex.compat import (\r\n File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\package_deps\py3\intelhex\compat.py", line 60:\r\n array_tobytes = getattr(array.array, "tobytes", array.array.tostring)\r\n========================== [FAILED] Took 0.60 seconds ==========================\r\n\r\nEnvironment Status Duration\r\n---------------- -------- ------------\r\nnrf51822_y5_mbug FAILED 00:00:00.600\r\n==================== 1 failed, 0 succeeded in 00:00:00.600 ===================="

The error itself:
AttributeError: type object 'array.array' has no attribute 'tostring'

Other notes:
I am using the latest Platform IO version.

What should I try to do to fix this?

(This issue has appeared 4 times already, but no one else included extra information about their system and configuration.)
EDIT was just looking through the issues page, it appears more than 4 times...

[Python380]

A little bit cleaned up:

.platformio/packages/framework-mbed/platformio/package_deps/py3/intelhex/compat.py, line 60

AttributeError:
object array.array has no attribute tostring

Could be python version?
Using python 3.9.6

[Python380]

Opening the project that I initialized and then attempting to build returns a clean version of the error messages above.

AttributeError: type object 'array.array' has no attribute 'tostring':
  File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\main.py", line 184:
    env.SConscript("$BUILD_SCRIPT")
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:
    return _SConscript(self.fs, *files, **subst_kw)
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "C:\Users\henri\.platformio\platforms\nordicnrf51\builder\main.py", line 116:
    target_elf = env.BuildProgram()
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:
    return self.method(*nargs, **kwargs)
  File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 63:
    env.ProcessProgramDeps()
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:
    return self.method(*nargs, **kwargs)
  File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 126:
    env.BuildFrameworks(env.get("PIOFRAMEWORK"))
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Util.py", line 742:
    return self.method(*nargs, **kwargs)
  File "C:\Users\henri\.platformio\penv\lib\site-packages\platformio\builder\tools\platformio.py", line 346:
    SConscript(env.GetFrameworkScript(f), exports="env")
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 660:
    return method(*args, **kw)
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:
    return _SConscript(self.fs, *files, **subst_kw)
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "C:\Users\henri\.platformio\platforms\nordicnrf51\builder\frameworks\mbed.py", line 35:
    SConscript(
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 660:
    return method(*args, **kw)
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 597:
    return _SConscript(self.fs, *files, **subst_kw)
  File "C:\Users\henri\.platformio\packages\tool-scons\scons-local-4.3.0\SCons\Script\SConscript.py", line 285:
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\platformio-build.py", line 40:
    from pio_mbed_adapter import PlatformioMbedAdapter
  File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\pio_mbed_adapter.py", line 23:
    from tools.build_api import (prepare_toolchain, merge_region_list,
  File "C:\Users\henri\.platformio\packages\framework-mbed\tools\build_api.py", line 30:
    from intelhex import IntelHex
  File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\package_deps\py3\intelhex\__init__.py", line 44:
    from intelhex.compat import (
  File "C:\Users\henri\.platformio\packages\framework-mbed\platformio\package_deps\py3\intelhex\compat.py", line 60:
    array_tobytes = getattr(array.array, "tobytes", array.array.tostring)

[Python380]

changing compat.py in intelhex to

# Copyright (c) 2011, Bernhard Leiner
# Copyright (c) 2013-2018 Alexander Belchenko
# All rights reserved.
#
# Redistribution and use in source and binary forms,
# with or without modification, are permitted provided
# that the following conditions are met:
#
# * Redistributions of source code must retain
#   the above copyright notice, this list of conditions
#   and the following disclaimer.
# * Redistributions in binary form must reproduce
#   the above copyright notice, this list of conditions
#   and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
# * Neither the name of the author nor the names
#   of its contributors may be used to endorse
#   or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

'''Compatibility functions for python 2 and 3.

@author     Bernhard Leiner (bleiner AT gmail com)
@author     Alexander Belchenko (alexander belchenko AT gmail com)
'''

__docformat__ = "javadoc"


import sys, array


# if sys.version_info[0] >= 3:
# Python 3
Python = 3

def asbytes(s):
    if isinstance(s, bytes):
        return s
    return s.encode('latin1')
def asstr(s):
    if isinstance(s, str):
        return s
    return s.decode('latin1')

array_tobytes = getattr(array.array, "tobytes", array.array.tostring)

IntTypes = (int,)
StrType = str
UnicodeType = str

range_g = range     # range generator
def range_l(*args): # range list
    return list(range(*args))

def dict_keys(dikt):        # dict keys list
    return list(dikt.keys())
def dict_keys_g(dikt):      # dict keys generator
    return dikt.keys()
def dict_items_g(dikt):     # dict items generator
    return dikt.items()

from io import StringIO, BytesIO

def get_binary_stdout():
    return sys.stdout.buffer

def get_binary_stdin():
    return sys.stdin.buffer

##else:
##    # Python 2
##    Python = 2
##
##    asbytes = str
##    asstr = str
##
##    array_tobytes = array.array.tostring
##
##    IntTypes = (int, long)
##    StrType = basestring
##    UnicodeType = unicode
##
##    #range_g = xrange    # range generator
##    def range_g(*args):
##        # we want to use xrange here but on python 2 it does not work with long ints
##        try:
##            return xrange(*args)
##        except OverflowError:
##            start = 0
##            stop = 0
##            step = 1
##            n = len(args)
##            if n == 1:
##                stop = args[0]
##            elif n == 2:
##                start, stop = args
##            elif n == 3:
##                start, stop, step = args
##            else:
##                raise TypeError('wrong number of arguments in range_g call!')
##            if step == 0:
##                raise ValueError('step cannot be zero')
##            if step > 0:
##                def up(start, stop, step):
##                    while start < stop:
##                        yield start
##                        start += step
##                return up(start, stop, step)
##            else:
##                def down(start, stop, step):
##                    while start > stop:
##                        yield start
##                        start += step
##                return down(start, stop, step)
##
##    range_l = range     # range list
##
##    def dict_keys(dikt):        # dict keys list
##        return dikt.keys()
##    def dict_keys_g(dikt):      # dict keys generator
##        return dikt.keys()
##    def dict_items_g(dikt):     # dict items generator
##        return dikt.items()
##
##    from cStringIO import StringIO
##    BytesIO = StringIO
##
##    import os
##    def _force_stream_binary(stream):
##        """Force binary mode for stream on Windows."""
##        if os.name == 'nt':
##            f_fileno = getattr(stream, 'fileno', None)
##            if f_fileno:
##                fileno = f_fileno()
##                if fileno >= 0:
##                    import msvcrt
##                    msvcrt.setmode(fileno, os.O_BINARY)
##        return stream
##
##    def get_binary_stdout():
##        return _force_stream_binary(sys.stdout)
##
##    def get_binary_stdin():
##        return _force_stream_binary(sys.stdin)
##

was not a success.
Could have guessed, the problem is with the array.array.tostring. I also know the fastest fix would be to hard-code it to be array.array.tobytes instead of getattr(...), but thought I'd better try other things first, just in case it was an issue with how things were set up.
reverting.

[Python380]

adding a () to the end of array.array.tostring did not work.

Reverting.

[Python380]

Checking python documentation for the array package tells me there is no array.array.tostring.
Changing line to read array_tobytes = array.array.tobytes worked. Note later on about a better fix.

[Python380]

Found a fix for AttributeError: type object 'array.array' has no attribute 'tostring'. @ivankravets

[Python380]

Note: wrapping array_tobytes = getattr(array.array, "tobytes", array.array.tostring) in a try/except may be a better fix.

[Python380]

Final compat.py file is attached in zip file.
compat.zip

[Python380]

Intel hex is outdated on framework-mbed. Opening pull request and issue there.