Programming Concepts 004

Question 1

What is “with open” used for?

Answer 1

It is used for explicit opening and closing of text files.

Question 2

What will this do?

with open(“test.txt”. ‘r’) as f:
file_content = f.read()
print(file_content)

Answer 2

It will open then print all the contents of test.txt.

Question 3

What will happen?

with open(“test.txt”, ‘r’) as f:
file_content = f.read()
print(file_content)

print(f.read())

Answer 3

It will error as it is trying to access a closed file when it is printing.

Question 4

What does read() do?

Answer 4

It reads a file as on single string.

Question 5

What does readlines() do?

Answer 5

It reads every separate line and stores them in a list based on the next line character.

Question 6

What does r and r+ do?

Answer 6

They both attempt to read a file but the + allows you to write to the file as well.

Question 7

What does w and w+ do?

Answer 7

They both attempt to write to a file and also can make a new file but the + also allows for reading from a file.

Question 8

What does a and a+ do?

Answer 8

They both act like w and w + where they write to a file but instead of overwriting everything it just adds to the end of the file.

Question 9

What purpose do we write to and read files?

Answer 9

It can be used for getting data. This is like saving in a game for you stats and progression. It just means it can be continued after the program turns off.