TypeError: 'datetime.date' object is not iterable while iterating over dict by date

Question

I am trying to iterate over dict, which contains dates as keys:

for d, dir in subdirs:
    print("d=", d, ", dir=", dir)

where subdirs is

datetime.date(2016, 9, 29): ['tiles/37/U/DB/2016/9/29/0/'],datetime.date(2017, 2, 23): ['tiles/37/U/DB/2017/2/23/0/'], datetime.date(2016, 4, 5): ['tiles/37/U/DB/2016/4/5/0/']

and so on.

I am receiving

TypeError: 'datetime.date' object is not iterable

Why and how to fix?

Answer 1

Try this -

for d, dir in subdirs.items():
    print("d=", d, ", dir=", dir)

If subdirs is a dict, using it in for will give you only the keys(in your case datetime.date object) and d, dir will try to unpack them. That is why the error.

Using the items() will return the (key, value) pair which will be unpacked and stored in d and dirs respectively