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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_df_from_file(file_path, sep=",", header=0):
 """Wrapper around pandas' read_csv."""

  with tf.gfile.Open(file_path) as infile:
    df = pd.read_csv(infile, sep=sep, header=header)
  return df