BitTorrent Sync log parsing using Python

import os,math
from datetime import *

thor = raw_input("Enter the name of the BitTorrent Sync debug log file: ")
odin = raw_input("Enter the name of the folder where synced files are stored: ")

report = open("report.log",'w');
sync_log = open(thor,'r');
fn = open("fn.log",'w');
pre_st = open("pre_st.log",'w');
pre_et = open("pre_et.log",'w');

report.write('Name of the files & corresponding no of chunks' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')

i=0
for eachline in sync_log:
    if 'Got file from remote' in eachline:
        i=i+1
        fn.write(str(eachline[88:135]) + ' ' + str(eachline[162:165]) + '\n')
        report.write(str(eachline[88:135]) + ' ' + str(eachline[162:165]) + '\n')
    elif 'event = "IN_CREATE"' in eachline:
        pre_st.write(str(eachline[43:90] + ' ' + eachline[10:22]) + '\n')
    elif 'Finished downloading file' in eachline:
        pre_et.write(str(eachline[50:97] + ' ' + eachline[10:22]) + '\n')
report.write('\n')

report.write('Total no of files' + '\n')
report.write('~~~~~~~~~~~~~~~~~' + '\n')
report.write(str(i) + '\n' + '\n')

report.write('Size of the files (in bytes)' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')
dir = odin
fs = open("fs.log",'w');
for f in os.listdir(dir):
    if os.path.isfile(dir + '/' + f) and len(f) == 47:
        fs.write(str(os.path.getsize(dir + '/' + f)) + '\n')
        report.write(f + ' ' + str(os.path.getsize(dir + '/' + f)) + '\n')

report.write('\n')
report.write('Size of the chunks of the files (in bytes)' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')

fs = open("fs.log",'r');
fn = open("fn.log",'r');
for eachline1, eachline2 in zip(fs, fn):
    chunk_size = float(eachline1)/float(eachline2[48:51])
    report.write(eachline2[:47] + ' ' + "%.2f" % chunk_size + '\n')

report.write('\n')
report.write('Sync starting time' + '\n')
report.write('~~~~~~~~~~~~~~~~~~' + '\n')

pre_st = open("pre_st.log", 'r')
st = open("st.log", 'w')
lineList = pre_st.readlines()
lineList.sort()
for line in lineList:
    st.write(line)
    report.write(line)
report.write('\n')
pre_st.close()

report.write('Sync ending time' + '\n')
report.write('~~~~~~~~~~~~~~~~' + '\n')

pre_et = open("pre_et.log", 'r')
et = open("et.log", 'w')
lineList = pre_et.readlines()
lineList.sort()
for line in lineList:
    et.write(line)
    report.write(line)
report.write('\n')
pre_et.close()

report.write('Time required for syncing (in seconds)' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')

st = open("st.log",'r');
et = open("et.log",'r');
tt = open("tt.log",'w');
for eachline1, eachline2 in zip(st, et):
        if eachline1[:47] == eachline2[:47]:
            s_t=datetime.strptime(eachline1[48:60], "%H:%M:%S.%f")
            e_t=datetime.strptime(eachline2[48:60], "%H:%M:%S.%f")
            diff=e_t-s_t
            tt.write(str(diff.seconds) + '\n')
            report.write(eachline1[:47] + ' ' + str(diff.seconds) + '\n')

report.write('\n')
report.write('Average syncing speed (in KBPS)' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')

fs = open("fs.log",'r');
tt = open("tt.log",'r');
ts = open("ts.log",'w');
for eachline1, eachline2 in zip(fs, tt):
    kbps = float(eachline1)/float(eachline2)/1024
    ts.write("%.2f" % kbps + '\n')
    report.write("%.2f" % kbps + '\n')

report.write('\n')
report.write('Some statistics regarding syncing speed' + '\n')
report.write('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' + '\n')

ts = open("ts.log",'r');
sum=0
sumsq=0
for eachline in ts:
    sum=sum+float(eachline)
    sumsq=sumsq+float(eachline)*float(eachline)

mean=sum/i
sd=math.sqrt((sumsq/i)-mean*mean)
report.write("Mean: %.3f" % mean + '\n')
report.write("SD: %.3f" % sd)

fs.close()
fn.close()
st.close()
et.close()
tt.close()
ts.close()
os.remove("pre_st.log")
os.remove("pre_et.log")
os.remove("fs.log")
os.remove("fn.log")
os.remove("st.log")
os.remove("et.log")
os.remove("tt.log")
os.remove("ts.log")

raw_input("\nThe log is analysed & the report is stored in report.log.")
raw_input("\nPress the enter key to exit.")