给出如下代码s = 'Python is Open Source!' print(s[0:].upper())
A. PYTHON
B. PYTHON IS OPEN SOURCE
C. Python is Open Source!
D. PYTHON IS OPEN SOURCE!
以下选项中可用作 Python 标识符的是
A. 3B9909
B. class
C. ____
D. it’s
表达式len(set([3,5,3,7,3,9])的值
已知x=[1,1],那么执行完语句for I in range(5): x.append(x[-1]+x[-2])之后,表达式x[-1]的值为