How to rewrite this lambda function to regular function

Question

result = map(lambda x: dictionary[x], mylist)

I am learning lambda expressions and the concept seems to be little confusing. I am trying to understand what this lambda function is supposed to do and rewrite as a separate function. My understanding is that it takes an item from the list and it then get a value from the dictionary...

Below is how I attempted to rewrite the lambda part

  result = list()
  for x in mylist:
      value = dictionary[x]
  result.append(value)

Thanks! how is it looping through or getting all the elements in the list. i tried to write a for loop but it doesn't give the same result. — , Nov 03 '19 at 06:56
You're rewriting *way* more than the `lambda` there. Is your goal to rewrite the `lambda`, or to rewrite the entire line that uses it? — user2357112, Nov 03 '19 at 07:06

score 1 · Answer 1 · answered Nov 03 '19 at 07:06

1

Read this Why are Python lambdas useful?

dictionary = {'a':5,'b':6,'c':7}
mylist = ['a','c']

def f1(x):
    return dictionary[x]

#lambda x: dictionary[x]

result= map(f1, mylist)
print(list(result))

answered Nov 03 '19 at 07:06

Pritish kumar

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How to rewrite this lambda function to regular function

1 Answers1