write() at beginning of file?

Question

I\'m doing it like this now, but I want it to write at the beginning of the file instead.

f = open(\'out.txt\', \'a\') # or \'w\'?
f.write(\"string 1\")
f.wr         


        

Answer 1

Elaborating on Daniel DiPaolo's answer:

Simply append all the lines that you want to write to a list. Reverse the list and then write its contents into the file.

f=open('output.txt','w')

l=[]
l.append("string 1")
l.append("string 2")
l.append("string 3")

for line in l:
    f.write(line)

f.close()

You could also use a deque and add lines at its beginning instead of using a list and reversing it.