Table of Contents
Question
- Get the key of a minimum value from the following dictionary
sample_dict = {
'Physics': 82,
'Math': 65,
'history': 75
}
Hint
- use build-in min() function
My attempt
- search and read the min(), though it is easy, but cannot figure out the answer
Recommend solution
sample_dict = {
'Physics': 82,
'Math': 65,
'history': 75
}
print(min(sample_dict, key=sample_dict.get))
What the min() function here does is ,
- it call the simple_dict.get() method on each key of the sample_dict
- i.e. sample_dict.get(Physics),simple_dict.get(Math),simple_dict.get(history) will be called
- a list of values of the sample_dict will be return
- and then use the values for comparison
- at last, the min() function will return corresponding key for the lowest value.
key point
- do not add () parentheses after the key=sample_dict.get
- as the min() function will execute the method for you, you just need to pass it the method name, not to execute it.
My reflection
- From this exercise, i learn there is more about the min() function, and understand why sometimes () parentheses is not added after method name or function name.
Credit
- exerices on Pynative