Ubuntu安装Python 3时出现多类错误，请求技术支持

我在Ubuntu系统中安装Python 3，执行安装命令时出现如下错误：

Preparing to unpack .../python3-update-manager_1%3a20.04.10.10_all.deb ...
/var/lib/dpkg/info/python3-update-manager.prerm: 6: py3clean: not found
dpkg: warning: old python3-update-manager package pre-removal script subprocess returned error exit status 127
dpkg: trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 6: py3clean: not found
dpkg: error processing archive /var/cache/apt/archives/python3-update-manager_1%3a20.04.10.10_all.deb (--unpack):
 new python3-update-manager package pre-removal script subprocess returned error exit status 127
/var/lib/dpkg/info/python3-update-manager.postinst: 6: py3compile: not found
dpkg: error while cleaning up:
 installed python3-update-manager package post-installation script subprocess returned error exit status 127
Preparing to unpack .../python3-distupgrade_1%3a20.04.38_all.deb ...
/var/lib/dpkg/info/python3-distupgrade.prerm: 6: py3clean: not found
dpkg: warning: old python3-distupgrade package pre-removal script subprocess returned error exit status 127
dpkg: trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 6: py3clean: not found
dpkg: error processing archive /var/cache/apt/archives/python3-distupgrade_1%3a20.04.38_all.deb (--unpack):
 new python3-distupgrade package pre-removal script subprocess returned error exit status 127
/var/lib/dpkg/info/python3-distupgrade.postinst: 6: py3compile: not found
dpkg: error while cleaning up:
 installed python3-distupgrade package post-installation script subprocess returned error exit status 127
Preparing to unpack .../sosreport_4.3-1ubuntu0.20.04.1_amd64.deb ...
/var/lib/dpkg/info/sosreport.prerm: 6: py3clean: not found
dpkg: warning: old sosreport package pre-removal script subprocess returned error exit status 127
dpkg: trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 6: py3clean: not found
dpkg: error processing archive /var/cache/apt/archives/sosreport_4.3-1ubuntu0.20.04.1_amd64.deb (--unpack):
 new sosreport package pre-removal script subprocess returned error exit status 127
/var/lib/dpkg/info/sosreport.postinst: 6: py3compile: not found
dpkg: error while cleaning up:
 installed sosreport package post-installation script subprocess returned error exit status 127
Errors were encountered while processing:
 /var/cache/apt/archives/python3-update-manager_1%3a20.04.10.10_all.deb
 /var/cache/apt/archives/python3-distupgrade_1%3a20.04.38_all.deb
 /var/cache/apt/archives/sosreport_4.3-1ubuntu0.20.04.1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

我已经多方搜索并尝试了更新软件包等多种命令，但都无效，恳请各位提供帮助。

补充说明

执行论坛提供的命令后，现在出现如下错误：

The following packages have unmet dependencies:
 python-is-python2 : Depends: python2 but it is not going to be installed
 ubuntu-release-upgrader-core : Depends: python3-distupgrade (= 1:20.04.38) but 1:20.04.23 is to be installed
 update-manager-core : Depends: python3-update-manager (= 1:20.04.10.10) but 1:20.04.10.1 is to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

内容的提问来源于stack exchange，提问作者Amira Elsayed Ismail