>>> a
122
>>> b
344
>>> c = chr(a)
>>> c
'z'
假如整数“i”超过了256将会爆出一个错误：
>>> d = chr(b)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: chr() arg not in range(256)
>>>
chr(i) 返回整数i对应的ASCII字符
>>> a
122
>>> b
344
>>> c = chr(a)
>>> c
'z'
假如整数“i”超过了256将会爆出一个错误：
>>> d = chr(b)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: chr() arg not in range(256)
>>>