cannot put the output in the written txt file in python [duplicate]

with open("new.txt", "w") as f: # opens a new file and gets you ready to write to it (hence the 'w', it stands for write) for i in range(1,5): for j in range(0,i): print(i,end=' ') f.write(f"{i} ") # write what you wanted to print print('\n') f.write("\n") # again write what you wanted to print # after this code executes python will automatically close the stream to the file (you do not need to do f.close() ) 

I left the prints in there so you can see what is being written to the file as well.

I see you have created the file, to write, all you need to do is this:

with open('new.txt', 'a') as the_file: for i in range(1, 5): for j in range(0,i): the_file.write(str(i) + " ") the_file.write('\n') 

Let me break it down:

1. The first line opens the txt file for you to write in it.
2. Then you loop through and write what you want to write. Notice how I changed the fourth line to the_file.write(str(i)+" "). This is because you can only use strings inside the write() function.

Running this, you get:

1 2 2 3 3 3 4 4 4 4 

Inside your txt file. Hope you found this helpful :D