The following code segment is supposed to read all of the lines from test. txt and save them in copy. txt. infile = open("test. txt", "r") outfile = open("copy. txt", "w") line = infile. readline() outfile. write(line) line = infile. readline() infile. close() outfile. close() which line of code should be placed in the blank to achieve this goal?

The line of code that should be placed is

while line:

The entire code should be as follows:

Explanation:

The Python built-in function readline() will read one line of text from test.txt per time. Hence, the code in Line 3 will only read the first line of text from test.txt.

To enable our program to read all the lines and copy to copy.txt, we can create a while loop (Line 5) to repeatedly copy the current read line to copy.txt and proceed to read the next line of text from test.txt (Line 6 -7).

"while line" in Line 5 means while the current line is not empty which denotes a condition of True, the codes in Line 6-7 will just keep running to read and copy the text until it reaches the end of file.