human
Solve the following python programming problem given the following code:
def normalize_calendar(self, s) : 
    def neitherspacenordigit(c) : 
        return ((not c.isspace ()) and (not c.isdigit ())) 
lines = [] 
    for line in s.splitlines (keepends = False) : 
        if (self and (not filter (neitherspacenordigit, line))) : 
            lines.append (line) 
return lines 

    
    

    Fix the buggy line: if (self and (not filter (neitherspacenordigit, line))) :
assistant
#Here is Python program to fix the buggy line: if (self and (not filter (neitherspacenordigit, line))) :
.

if (line and (not filter (neitherspacenordigit, line))) :