def fileIO():
  """
by Daniel Armentrout
ENG 101 – 06
File I/O Practice Assignment
Due: 11/12/19
Function to read in data from a file and average
10 data points in two columns. Call function with:
fileIO()
"""

  import csv
  C1=[]   # Clear list for Column 1 data
  C2=[]   # Clear list for Column 2 data
    # Open and store data
  with open('ExData2.csv', newline='') as In_f:
    readf = csv.reader(In_f, delimiter="*")
    Header=True
    for row in readf:
      if Header:
        HData=row
        Header=False
      else:  
        C1.append(float(row[0]))
        C2.append(float(row[1]))  
  # Write out processed data
  with open('ExOut.csv', 'w', newline='') as Out_file:
    OData = csv.writer(Out_file, delimiter=",")
    OData.writerow(HData)
    L=len(C1)
    n=int(L/10)  
    for i in range(0,n):
      ave1=0
      ave2=0
      for j in range(0,10):
        ave1+=C1[i*10+j]
        ave2+=C2[i*10+j]
      ave1/=10
      ave2/=10
      rout=[str(ave1)]+[str(ave2)]
      OData.writerow(rout)