[Boundaries Between Range Boundaries] #endpoints #numpy #classify #pandas

ranges_in_between_ranges.py

def get_ranges_in_between_ranges(df, start_name, stop_name):
    """
    Get range boundaries in between range boundaries arranged to be strictly increasing. 
    For example if we had three range boundaries where the range start and stop values
    are found in two separate columns in a dataframe, 
    
    start, stop
    -----------
     0,     5
     7,     8
    12,    15
    
    The range boundaries in between are
    
    start, stop
    -----------
     5,     7
     8,    12
    """
    # This can be made into a one-liner if desired. 
    subset_df = df[[start_name, stop_name]]
    v = subset_df.values
    r = np.ravel(v)[1:-1]
    rs = r.reshape(-1, 2)
    return rs