data_positions = [1,51,151,153,155,175,225,275,325,375,425,426,427,437,487,489,539,589,639,640,690,740,742,792,794, ...]

csv_file = open("stream.csv", "r")
data = csv_file.read()
rows = data.split('n')

stream_data = []

for e in rows:
    split_e = e.split(",")
    stream_data.append(split_e)


#Open and clear file for writing new values
file = open("stream.txt", "r+")
file.truncate()
file.close()

file = open("stream.txt", "w")

for line in stream_data:
    for i in range(0,len(line)):
        file.seek(data_positions[i]-1)
        file.write(line[i])
    file.write("n")

file.close()