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@bilaljavaid01 the only place you are short on space is the ROM, Read Only Memory AKA you cannot write to it. So you actually have a lot of space available, but the installation is not using that space.
Step 1 look at python lite which is designed for low-resource devices, ie IoT devices like Omega2. Step 2, look at where the package is being installed and set up a symlink so that directory is linked to your sda2 device. For example, one of my apps used SQLite for a database which gets pretty large, so I create a symlink to /etc/<my app name>/data that points to /dev/mmcblk0p1 which is a 64GB SD card.