Python:Efficient way to check if dictionary is empty or not [duplicate]

Question

How to check if dictionary is empty or not? more specifically, my program starts with some key in dictionary and I have a loop which iterates till there are key in dictionary. Overall algo is like this:

Start with some key in dict
while there is key in dict
do some operation on first key in dict
remove first key

Please note that some operation in above loop may add new keys to dictionary. I've tried for key,value in d.iteritems()

but it is failing as during while loop some new key are added.

Answer 1

any(d)

This will return true if the dict. d contains at least one truelike key, false otherwise.

Example:

any({0:'test'}) == False

another (more general) way is to check the number of items:

len(d)

Answer 2

I just wanted to know if the dictionary i was going to try to pull data from had data in it in the first place, this seems to be simplest way.

d = {}  bool(d)  #should return False  d = {'hello':'world'}  bool(d)  #should return True