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cdef extern from "Python.h": 
 
    ############################################################################ 
    # 7.2.3 
    ############################################################################ 
    # PyFloatObject 
    # 
    # This subtype of PyObject represents a Python floating point object. 
 
    # PyTypeObject PyFloat_Type 
    # 
    # This instance of PyTypeObject represents the Python floating 
    # point type. This is the same object as float and 
    # types.FloatType. 
 
    bint PyFloat_Check(object p) 
    # Return true if its argument is a PyFloatObject or a subtype of 
    # PyFloatObject. 
 
    bint PyFloat_CheckExact(object p) 
    # Return true if its argument is a PyFloatObject, but not a 
    # subtype of PyFloatObject. 
 
    object PyFloat_FromString(object str, char **pend) 
    # Return value: New reference. 
    # Create a PyFloatObject object based on the string value in str, 
    # or NULL on failure. The pend argument is ignored. It remains 
    # only for backward compatibility. 
 
    object PyFloat_FromDouble(double v) 
    # Return value: New reference. 
    # Create a PyFloatObject object from v, or NULL on failure. 
 
    double PyFloat_AsDouble(object pyfloat) except? -1 
    # Return a C double representation of the contents of pyfloat. 
 
    double PyFloat_AS_DOUBLE(object pyfloat) 
    # Return a C double representation of the contents of pyfloat, but 
    # without error checking.