why my ouput is showing error?

Question

try:
f=open("filename.txt")
print(f.read())
print(1/0)
finally:
f.close()

Answer 1

except ZeroDivisionError:

Answer 2

Tnx,elder.

Answer 3

Because atleast the ZeroDivisionError was not catched.
There is also a risk for FileNotFoundError, which was not catched.