code: def load_customer(fpath):
      cols_names = [
          "C_CUSTKEY",
          "C_NAME",
          "C_ADDRESS",
          "C_NATIONKEY",
          "C_PHONE",
          "C_ACCTBAL",
          "C_MKTSEGMENT",
          "C_COMMENT",
      ]
      cols = {
          "C_CUSTKEY": np.int64,
          "C_NAME": str,
          "C_ADDRESS": str,
          "C_NATIONKEY": np.int64,
          "C_PHONE": str,
          "C_ACCTBAL": np.float64,
          "C_MKTSEGMENT": str,
          "C_COMMENT": str,
      }
      rel = pd.read_csv(
          fpath, sep="|", header=None, names=cols_names, dtype=cols
      )
      return rel
  
file_path: mars/benchmarks/tpch/loader.py
imports: import numpy
  import pandas
label_desc: Use image node_id 6 for calling a global function with example usage: load_customer(fpath) and returns: rel