

In [6]:

    
schema = \
    {"Attributes": 
         {"year":    {"dtype": int, 
                      "format": "%4d", 
                      "null": -999,
                      "width": 4},
          "month":   {"dtype": int, 
                      "format": "%02d",
                      "null": -9,
                      "width": 2},
          "day":     {"dtype": int, 
                      "format": "%02d", 
                      "null": -9,
                      "width": 2},
          "hour":    {"dtype": int, 
                      "format": "%03d", 
                      "null": -99,
                      "width": 3},
          "minute":  {"dtype": int, 
                      "format": "%03d", 
                      "null": -99,
                      "width": 3},
          "second":  {"dtype": float, 
                      "format": "%6.3f", 
                      "null": -9.999,
                      "width": 6},
          "eID":     {"dtype": int, 
                      "format": "%10d", 
                      "null": -999999999,
                      "width": 10},
          "latR":     {"dtype": float, 
                      "format": "%9.5f", 
                      "null": -99.99999,
                      "width": 9},
          "lonR":     {"dtype": float, 
                      "format": "%10.5f",
                      "null": -999.99999,
                      "width": 10},
          "depR":    {"dtype": float,
                      "format": "%7.3f", 
                      "null": -99.999,
                      "width": 7},
          "mag":     {"dtype": float, 
                      "format": "%5.2f",
                      "null": -9.99,
                      "width": 5},
          "qID":     {"dtype": int,
                      "format": "%7d", 
                      "null": -999999,
                      "width": 7},
          "cID":     {"dtype": int,
                      "format": "%7d",
                      "null": -999999,
                      "width": 7},
          "nbranch": {"dtype": int, 
                      "format": "%7d",
                      "null": -999999,
                      "width": 7},
          "qnpair": {"dtype": int, 
                      "format": "%5d",
                      "null": -9999,
                      "width": 5},
          "qndiffP": {"dtype": int,
                        "format": "%5d",
                        "null": -9999,
                        "width": 5},
          "qndiffS": {"dtype": int,
                      "format": "%5d",
                      "null": -9999,
                      "width": 5},
          "rms":     {"dtype": float,
                      "format": "%5.2f",
                      "null": -9.99,
                      "width": 5},
          "rmsP": {"dtype": float,
                     "format": "%5.2f",
                     "null": -9.99,
                     "width": 5},
          "rmsS": {"dtype": float,
                    "format": "%5.2f",
                    "null": -9.99,
                    "width": 5},
          "eh": {"dtype": float,
                    "format": "%7.3f",
                    "null": -99.999,
                    "width": 7},
          "ez": {"dtype": float,
                    "format": "%7.3f",
                    "null": -99.999,
                    "width": 7},
          "et": {"dtype": float,
                    "format": "%7.3f",
                    "null": -99.999,
                    "width": 7},
          "latC": {"dtype": float,
                    "format": "%11.5f",
                    "null": -9999.99999,
                    "width": 11},
          "lonC": {"dtype": float,
                    "format": "%10.5f",
                    "null": -999.99999,
                    "width": 10},
          "depC": {"dtype": float,
                     "format": "%7.3f",
                     "null": -99.999,
                     "width": 7},
          "lat":      {"dtype": float, 
                      "format": "%9.5f", 
                      "null": -99.99999,
                      "width": 9},
          "lon":      {"dtype": float, 
                      "format": "%10.5f",
                      "null": -999.99999,
                      "width": 10},
          "depth": {"dtype": float,
                     "format": "%7.3f",
                     "null": -99.999,
                     "width": 7}
         },
     "Relations": 
         {"catalog":["year", "month", "day", "hour", "minute", "second", "eID", 
                     "latR", "lonR", "depR", "mag", "qID", "cID", "nbranch", 
                     "qnpair", "qndiffP", "qndiffS", "rmsP", "rmsS", "eh", "ez", "et", 
                     "latC", "lonC", "depC"],
          "event.phase": ["year", "month", "day", "hour", "minute", "second", "lat", "lon",
                          "depth", "mag", "eh", "ez", "rms", "eID"]}
    }