<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def readline( file, skip_blank=False ):
 """Read a line from provided file, skipping any blank or comment lines"""

    while 1:
        line = file.readline()
        #print "every line: %r" % line
        if not line: return None 
        if line[0] != '#' and not ( skip_blank and line.isspace() ):
            return line