Let's analyze this code step by step:
d = {} creates an empty dictionary.
d[1] = 1 adds a key-value pair where the key is the integer 1 and the value is 1.
d['1'] = 2 adds another key-value pair where the key is the string '1' and the value is 2.
d[1] += 1 increments the value associated with the key 1. So now d[1] becomes 2.
sum = 0 initializes a variable sum to 0.
The for loop for k in d: iterates over the keys in the dictionary.
In each iteration, it adds the value associated with the current key to sum.
After the loop, sum will contain:
2 (from d[1])
2 (from d['1'])
Therefore, the final value of sum will be 4.
print(sum) will output this final value.
So, the output of this code will be: 4
d = {}
d[1] = 1 >> value of the key integer 1 is integer 1
d['1'] = 2 >> value of the key string '1' is 2
d[1] +=1 >> update the value of the key integer 1 to 1+1 =2
>>> final list is {1: 2, '1': 2}
sum = 0
for k in d:
sum += d[k] >> sum the values that associate to all the keys >> the answer is 2+2 = 4 (C)
print(sum)
print(d)
d = {} # Create an empty dictionary d
d[1] = 1 # Add a key-value pair where key is 1 and value is 1
d['1'] = 2 # Add a key-value pair where key is the string '1' and value is 2
d[1] += 1 # Increment the value associated with the key 1 by 1
{1: 2, '1': 2}
sum = 0 # Initialize sum to 0
for k in d: # Iterate over each key in the dictionary d
sum = sum + d[k] # Add the value associated with key k to sum
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