human
Solve the following python programming problem given the following code:
@ derived_from (pd.DataFrame) 
def var(self, axis = None, skipna = True, ddof = 1) : 
    axis = self._validate_axis (axis) 
    if (axis == 1) : 
        f = (lambda x : x.var (axis = 1, skipna = skipna, ddof = ddof)) 
        name = '{0}var(axis=1, ddof={1})'.format (self._token_prefix, ddof) 
        return map_partitions (f, None, self, token = name) 
else : 
        num = self._get_numeric_data () 
        x = (1.0 * num.sum (skipna = skipna)) 
        x2 = (1.0 * (num ** 2).sum (skipna = skipna)) 
        n = num.count () 
        def f(x2, x, n) : 
            try : 
                result = ((x2 / n) - ((x / n) ** 2)) 
                if ddof : 
                    result = ((result * n) / (n - ddof)) 
return result 
except ZeroDivisionError : 
                return np.nan 
name = '{0}var(ddof={1})'.format (axis._token_prefix, ddof) 
        return map_partitions (f, None, x2, x, n, token = name) 

    
    

    Fix the buggy line: name = '{0}var(ddof={1})'.format (axis._token_prefix, ddof)
assistant
#Here is Python program to fix the buggy line: name = '{0}var(ddof={1})'.

name = '{0}var(ddof={1})'.format (self._token_prefix, ddof)