["python","python-2.7","dictionary","filtering"]
filter items in a python dictionary where keys contain a specific string

I'm a C coder developing something in python. I know how to do the following in C (and hence in C-like logic applied to python), but I'm wondering what the 'Python' way of doing it is. I have a dictionary d, and I'd like to operate on a subset of the items, only those whose key (string) contains a specific substring. i.e. the C logic would be: for key in d: if filter_string in key: # do something else # do nothing, continue I'm imagining the python version would be something like filtered_dict = crazy_python_syntax(d, substring) for key,value in filtered_dict.iteritems(): # do something I've found a lot of posts on here regarding filtering dictionaries, but couldn't find one which involved exactly this. My dictionary is not nested and i'm using python 2.7
How about a dict comprehension: filtered_dict = {k: v for k, v in d.iteritems() if filter_string in k} One you see it, it should be self-explanatory, as it reads like English pretty well. This syntax requires Python 2.7 or greater. In Python 3, there is only dict.items(), not iteritems() so you would use: filtered_dict = {k: v for k, v in d.items() if filter_string in k}