strStr = ["192.168.42.12", "192.168.42.2"]
# the "e:\temp\111.txt" is the searching file storage path.
with open(datausage) as f:
    lines = f.readlines()
    for line in lines:
        for ii in strStr:
            if ii in line:
                result = line
                ip = line[5:-50]
                result_ip = ip.replace(" ", "")
                usage = line[-8:]
                d = usage.replace('KB', '')
                usage = d.replace('B', '')
                usage = usage.replace('\n', '')

                print result_ip + '\t\t\t' + str(usage)