[graph-tool] ImportError: No module named graph_tool.all

Hi, I am new in using graph_tool.After I have installed graph_tool,it shows"No module named graph_tool.all" I don't know how to solve this problem. I think I have successfully generated the makefile and correctly compiled it. Attached file 2nd is the output when I compiled the graph_tool. Attached file 3rd is the output when I configured graph_tool. I have tried many times,but it still doesn't work.Who can help me? Thanks a lot.