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To upgrade your python version in Ubuntu 18.10 Following these steps: omprakash@omprakash: ~$ sudo apt-get install python3.7 Reading package lists... Done Building dependency tree       Reading state information... Done The following additional packages will be installed:   python3.7-minimal Suggested packages:   python3.7-venv python3.7-doc binfmt-support The following NEW packages will be installed:   python3.7 python3.7-minimal 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 1,944 kB of archives. After this operation, 10.2 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://in.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 python3.7-minimal amd64 3.7.3-2~18.10 [1,660 kB] Get:2 http://in.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 python3.7 amd64 3.7.3-2~18.10 [284 kB] Fetched 1,944 kB in 12s (164 kB/s)                                             Selecting previously unselected package python3.7-minimal.