您如何看待导入模块中的导入失败？

Question

I need to make a portable app to put on a device and I want to put only the modules needed so there will not be all the standard modules so I need to see what my app needs, but if that module misses some imports I cannot see that, because it gives an error without being explicit what fails in that module:

Traceback (most recent call last):
  File "./packaging.py", line 30, in <module>
    import simplejson
ImportError: No module named simplejson

Is there a way to see what import exactly fails in that module?

Answer 1

The error means, that the import import simplejson fails because there is “[n]o module named simplejson” . The solution is to simply install said module .

Answer 2

you can catch the exceptions, to know what went wrong and handle them appropriately:

try:
   import simplejson
except ImportError:
   print "simplejson module not found"
   #or do something else here, may be install that module

Answer 3

可能是字符串/usr/lib/python2.7/dist-packages不在sys.path文件夹列表中，因此在尝试导入模块或软件包时不会搜索该字符串。