def has_na(eqdata):
if isinstance(eqdata, pd.DataFrame):<EOL><INDENT>_values = eqdata.values<EOL><DEDENT>else:<EOL><INDENT>_values = eqdata<EOL><DEDENT>return len(_values[pd.isnull(_values)]) > <NUM_LIT:0><EOL>
Return false if `eqdata` contains no missing values.

Parameters
----------
eqdata : DataFrame or ndarray
    Data to check for missing values (NaN, None)

Returns
----------
answer : bool
    False iff `eqdata` contains no missing values.