1. a, b = a, a + b 先计算右边表达式,然后再同时赋值给左边. 2. 条件控制和循环语句 条件控制 if condition_1: statement_block_1 elif condition_2: statement_block_2 else: statement_block_3 while 循环 while condition: statement_block else: # 可有可无 statement_block for 循环 for <variable> in &…