Why can't read from file - io.UnsupportedOperation: not readable?

Question

Python

I wrote a simple code in Notepad++ in Python. Launched on this video. Here is the code:
f=open('text.txt','w')
f.write("adc")
f.read()
After running, I got this message:
Traceback (most recent call last):
File "C:\ Users\ZERO\Desktop\Programming\new1.py", line 3, in
f.read()
io.UnsupportedOperation: not readable
So gentlemen, what's the problem?

Answer 1

How many accolades.
You yourself opened the file for writing, and then you want to read it. Do not do it this way.

Answer 2

Is it okay that you opened the file for writing and are trying to read from it? Python says so, read the errors, after all

Answer 3

Clearly, thanks, I just met Python`om yesterday. So, sorry for the stupid question.

Answer 4

hahaha) the file was opened for reading.
change 'w' to '+'