Q:in python2.7,UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte:?

A:

Your string has a non ascii character encoded in it.

Not being able to decode with utf-8 may happen if you've needed to use other encodings in your code. For example:

>>> 'my weird character \x96'.decode('utf-8')

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "C:\Python27\lib\encodings\utf_8.py", line 16, in decode

return codecs.utf_8_decode(input, errors, True)

UnicodeDecodeError: 'utf8' codec can't decode byte 0x96 in position 19: invalid start byte

In this case, the encoding is windows-1252 so you have to do:

>>> 'my weird character \x96'.decode('windows-1252')

u'my weird character \u2013'

Now that you have unicode, you can safely encode into utf-8.

python脚本crontab执行的几个坑。

坑一：

一般linux都预安装python，但是版本比较低。会出现python程序手工执行正常，但是用crontab执行报错，如缺少某某模块之类的。

最直接的解决办法：使用新版本python的绝对路径执行，如：

0 14 * * * /usr/local/bin/python2.7 /xxx.py > /yyy.log 2>&1 &

坑二：

如果python程序内使用到一些涉及环境变量的方法可能差异，如：

cfg = ConfigParser.ConfigParser()

cfg.read(r'/home/work/open-falcon/addin/sms.ini')

这里如果采用相对路径./sms.ini亦会导致无法正常读取。