Final answer:
The Python code provided will display the entire string 'abcdefg' as it uses slicing to copy the full string without specifying a start or end index.
Step-by-step explanation:
The code mystring = 'abcdefg' print(mystring[:]) in Python uses slicing to manipulate strings. The syntax mystring[:], where mystring is the variable containing the string, is a slice operation that copies the entire string.
There are no start or end indices specified, which means it starts at the beginning and goes all the way to the end of the string. In this case, the code will display the full string 'abcdefg'.