一:先看一段程序
<strong><span style="font-size:18px;">a = [1,2,3]
b = a
b[0] = 0
print b
print a</span></strong><strong><span style="font-size:18一:先看一段程序
<strong><span style="font-size:18px;">a = [1,2,3]
b = a
b[0] = 0
print b
print a</span></strong><strong><span style="font-size:18