mongodb query - PyMongo $in + $regex

Question

How can I combine $regex with $in in PyMongo?

I want to search for either /*.heavy.*/ or /*.metal.*/.

I tried in python without success:

db.col.find({'music_description' : { '$in' : [ {'$regex':'/*.heavy.*/'} ]} })

The equivalent in Mongo shell is:

db.inventory.find( { music_description: { $in: [ /heavy/, /metal/ ] } } )

Answer 1

Use python regular expressions.

import re
db.col.find({'music_description': {'$in': [ re.compile('.*heavy.*'), re.compile('.*metal.*')]}})