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2. python - How can I add new keys to a dictionary? - Stack Overflow

   stackoverflow.com/questions/1024847

   You can use the dictionary constructor and implicit expansion to reconstruct a dictionary. Moreover, interestingly, this method can be used to control the positional order during dictionary construction (post Python 3.6). In fact, insertion order is guaranteed for Python 3.7 and above!

3. python - How to check if a value exists in a dictionary ... -...

   stackoverflow.com/questions/8214932

   to test if "one" is among the values of your dictionary. In Python 2, it's more efficient to use. "one" in d.itervalues() instead. Note that this triggers a linear scan through the values of the dictionary, short-circuiting as soon as it is found, so this is a lot less efficient than checking whether a key is present.

4. The best way to filter a dictionary in Python - Stack Overflow

   stackoverflow.com/questions/8425046

   d = dict((k, v) for k, v in d.iteritems() if v > 0) In Python 2.7 and up, there's nicer syntax for this: d = {k: v for k, v in d.items() if v > 0} Note that this is not strictly a filter because it does create a new dictionary. edited May 18, 2015 at 23:40.

5. python - Get key by value in dictionary - Stack Overflow

   stackoverflow.com/questions/8023306

   @OrsirisdeJong dict.keys(), etc are dictionary view objects and have been so in all Python 3 releases, not just since 3.6. Don’t turn those into a list, use next((k for k, v in dict.items() if v == search_age), None) to find a match.

6. python - Append a dictionary to a dictionary - Stack Overflow

   stackoverflow.com/questions/8930915

   There are two ways to add one dictionary to another: Update (modifies orig in place) orig.update(extra) # Python 2.7+. orig |= extra # Python 3.9+. Merge (creates a new dictionary) # Python 2.7+. dest = collections.ChainMap(orig, extra) dest = {k: v for d in (orig, extra) for (k, v) in d.items()} # Python 3.

7. Python creating a dictionary of lists - Stack Overflow

   stackoverflow.com/questions/960733

   Python - create dictionary from list of dictionaries. 20. Creating a dictionary with list of lists in ...

8. python - Iterating over dictionaries using 'for' loops - Stack...

   stackoverflow.com/questions/3294889

   When you iterate through dictionaries using the for .. in .. -syntax, it always iterates over the keys (the values are accessible using dictionary[key]). To iterate over key-value pairs, use the following: for k,v in dict.iteritems() in Python 2. for k,v in dict.items() in Python 3.

9. python - How to save a dictionary to a file? - Stack Overflow

   stackoverflow.com/questions/19201290

   Unless you really want to keep the dictionary, I think the best solution is to use the csv Python module to read the file. Then, you get rows of data and you can change member_phone or whatever you want ; finally, you can use the csv module again to save the file in the same format as you opened it.

10. python - Getting key with maximum value in dictionary? - Stack...

    stackoverflow.com/questions/268272

    Python 2. For Python 2.2+ releases, the same code will work. However, it is better to use iteritems() dictionary method instead of items() for performance. Notes. This answer is based on the comments on Climbs_lika_Spyder's answer. The used code was tested on Python 3.5.2 and Python 2.7.10 .

11. Python dictionary increment - Stack Overflow

    stackoverflow.com/questions/12992165

    In Python it's annoying to have to check whether a key is in the dictionary first before incrementing it: if key in my_dict: my_dict[key] += num else: my_dict[key] = num Is there a shorter