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Is it possible to add values in dictionary in lambda expression?
That is to implement a lambda which has the similar function as below methods.
def add_value(dict_x):
dict_x['a+b'] = dict_x['a'] + dict_x['b']
return dict_x
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You can add data or values to a dictionary in Python using the following steps: First, assign a value to a new key. Use dict. Update() method to add multiple values to the keys.
Appending element(s) to a dictionary To append an element to an existing dictionary, you have to use the dictionary name followed by square brackets with the key name and assign a value to it.
In particular, a lambda function has the following characteristics: It can only contain expressions and can't include statements in its body. It is written as a single line of execution.
Technically, you may use side effect to update it, and exploit that None returned from .update is falsy to return dict via based on boolean operations:
add_value = lambda d: d.update({'a+b': d['a'] + d['b']}) or d
I just don't see any reason for doing it in real code though, both with lambda or with function written by you in question.
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