Memory error while saving dictionary of size 65000X50 using pickle

[Nagu]

I didn't have the problem with dumping as a string. When I tried to
save this object to a file, memory error pops up.

I am sorry for the mention of size for a dictionary. What I meant by
65000X50 is that it has 65000 keys and each key has a list of 50
tuples.

I was able to save a dictionary object with 65000 keys and a list of
15-tuple values to a file. But I could not do the same when I have a
list of 25-tuple values for 65000 keys.

You exmple works just fine on my side.

Thank you,
Nagu