求解：将其他数据类型转化成字符串时出错

FireACE

如图，转化成其他类型没毛病，就是转化成字符串时报错

BngThea

应该是你上面定义了一个str的变量，和内置函数str重名导致的

安梓颜i

1. >>> a = '520'
   
2. >>> int(a)
   
3. 520
   
4. >>> float(a)
   
5. 520.0
   
6. >>> str(a)
   
7. '520'
   
8. >>>

复制代码

安梓颜i

不论你a赋的是数字还是字符串，转换为字符串都有个引号

pyinhe

正确的。可能是你的版本的问题。我使用2.7.14及3.6.5均正常运行。运行情况如下：
Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:19:30) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> a = 520
>>> str(a)
'520'
>>> a = '520'
>>> int(a)
520
>>> float(a)
520.0
>>>

Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> a = 520
>>> str(a)
'520'
>>> a = '520'
>>> int(a)
520
>>> float(a)
520.0
>>>