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Two real-life solutions to value error reporting and encoding error reporting in Python when processing JSON

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2016-07-06 13:29:461472browse

1、ValueError: Invalid control character at: line 1 column 8363 (char 8362)
使用json.loads(json_data)时,出现:

ValueError: Invalid control character at: line 1 column 8363 (char 8362)

出现错误的原因是字符串中包含了回车符(\r)或者换行符(\n)
解决方法:
(1)对这些字符转义:

json_data = json_data.replace('\r', '\\r').replace('\n', '\\n')

(2)使用关键字strict:

json.loads(json_data, strict=False)

strict默认是True,它将严格控制内部字符串,将其设置为False,便可以允许你\n \r。


2、UnicodeEncodeError: ascii codec can't encode错误
在windows下写的python脚本,放到linux下运行,直接报:

UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-11: ordinal not in range(128)

出错原因是Python2.7在安装时,默认的编码是ascii,当程序中出现非ascii编码时,Python的处理常常会报这样的错,不过在Python3中就不会有这样的问题。
解决方法:
(1)临时解决方法:
在代码前加入:
import sys 
reload(sys) 
sys.setdefaultencoding('utf8')

(2)一劳永逸:
在Python的lib\site-packages文件夹下新建一个sitecustomize.py,内容如下:

# encoding=utf8 
import sys 

reload(sys) 
sys.setdefaultencoding('utf8')

这样的话,系统在Python启动的时候,自行调用该文件,设置系统的默认编码。

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