Prepend line to beginning of a file #file #python

prepend_a_line.py

#Prepend a line at the top of the file
def line_prepender(filename, line):
    with open(filename, 'r+') as f:
        content = f.read()
        f.seek(0, 0)
        f.write(line.rstrip('\r\n') + '\n' + content)


infile = "c_test.csv"
outfile = "complete_test.csv"
delete_list = ["b'", "'"]
fin = open(infile)
fout = open(outfile, "w+")
for line in fin:
    for word in delete_list:
        line = line.replace(word, "")
    fout.write(line)
fin.close()
fout.close()
line_prepender(outfile, li)