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sum(int(j)<<i*8for i,j in enumerate(input().split('.')[::-1])), removing an unnecessary space before thefor(though modern Python emits aSyntaxWarningfor that), and using shifting+multiplication instead of multiplication+exponentiation avoids more terms and parentheses. \$\endgroup\$8*(3-i)as factor and dropping the reversing slice[::-1], you get rid of the warning and save bytes. Takinginput()would requireprint()output though. Better just use an anonymous lambda. \$\endgroup\$