Why name "file" is not defined?

Question

Hi, there.
I wanna the code to read a file named 1.txt and print the contents on the screen. So I used the file scription introduced in Solo learn, but when I run codes on my PC, it returned with error message.

CODE:
text = open("D:/1.txt","r")
ptxt = file.read()
print(ptxt)
file.close()

TERMINAL:
file.py, line 2, in<module>
ptxt = file.read()
NameError: name "file" is not defined.

ENVIRONMENT:
WIN10 64 BIT, PYTHON 3.7 64 BIT

Answer 1

text.read()
...
text.close()