Read lines starting with numbers
Question: How can I only read lines in a file that start with numbers in python i.e

    
    
    Hello World <--ignore
    Lovely day
    blah43 
    blah
    1234 <--read
    blah12 <--ignore
    blah 
    3124 <--read
    Not matter how many words there are <--ignore
    blah 
    0832 8423984 234892304 8239048324 8023948<--read
    blah132 <--ignore
    


Answer: 
    import re
    with open("filename") as f:
        for line in f:
            if re.match(r"^\d+.*$",line):
                print line
    

