Question

When I run the script, I had this ImportError:

$ python ~/Dropbox/code/py/ZoteroFindOrphanedFiles.py 
Traceback (most recent call last):
  File "/home/zane/Dropbox/code/py/ZoteroFindOrphanedFiles.py", line 1, in <module>
    import sqlite3
  File "/usr/lib/python3.2/sqlite3/__init__.py", line 23, in <module>
    from sqlite3.dbapi2 import *
  File "/usr/lib/python3.2/sqlite3/dbapi2.py", line 23, in <module>
    import datetime
  File "/usr/lib/python3.2/datetime.py", line 20, in <module>
    import math as _math
  File "/home/zane/Dropbox/code/py/math.py", line 3, in <module>
    from nzmath.rational import Integer, Rational
ImportError: No module named nzmath.rational

But I don’t have it when running the interactive session:

$ python
Python 3.2.3 (default, Apr 23 2012, 23:14:44) 
[GCC 4.7.0 20120414 (prerelease)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
>>> 

Why is that?

Answer 1

Here is the problem:

  import math as _math
File "/home/zane/Dropbox/code/py/math.py", line 3, in <module>

You have your own module called math.py, but this is the same as a standard Python module of the same name. This is not recommended.

The solution is to rename your math.py to something else, and don’t forget to delete the math.pyc in the same directory (otherwise you’ll still have the same problem).