You are free to select any other student from your class to be your partner. Make sure that both names appear on all work submitted by the pair.
You should make a reasonable attempt to remain with the same partner for the entire class. Research studies have shown that it can take several weeks for a pair to “jell” and begin working well together. Changing partners interferes with this jelling process.
If your partner doesn't show up to a scheduled programming session you may try and complete the assignment yourself. If you complete it, there are several options, which depend on what happened with your partner. IN ALL CASES, you should clearly document what happened both in the program comments and in the comment field of the log you submit.
Case 1: You do not meet up with your partner before it is time to submit the program. In this case you simply submit the program with only your name on it. If the program was partially completed with your partner before the breakdown occurred, make a note in the program comments indicating your best estimate of how complete the program was before you finished it alone, using a percentage. Also list your partner in the programming log only if you had the program at least 75% completed before the breakup. You should also indicate the breakup in the comments section of the log.
Case 2: Before turning in the program, you meet up with your partner but your partner has NOT yet completed the assignment.
Case 3: Before turning in the program, you meet up with your partner and your partner HAS also completed the assignment.