Сколько строк в файле "pycode.ru/files/python/mbox-short.txt"

  myFile=open('mbox-short.txt') fileToString=myFile.read() print fileToString[55:63] 

  myFile=open('mbox-short.txt') fileToString=myFile.read() print fileToString[94:101]  

  myFile=open('mbox-short.txt') fileToString=myFile.read() print fileToString[71:81]  

 myFile=open('mbox-short.txt')for line in myFile:line = line.rstrip()if  line.startswith('Author:'):    print(line) 

 myFile=open('mbox-short.txt')for line in myFile:line = line.rstrip()if  line.startswith('Author:'):    print(line) 

 myFile=open('mbox-short.txt')for line in myFile:line = line.rstrip()if  line.startswith('Author:'):    print(line)