learn Python By Example – How to Apply Functions To List Items

Applying Functions To List Items

Create a list of regiment names

regimentNames = ['Night Riflemen', 'Jungle Scouts', 'The Dragoons', 'Midnight Revengence', 'Wily Warriors']

Using A For Loop

Create a for loop goes through the list and capitalizes each

/* create a variable for the for loop results */
regimentNamesCapitalized_f = []

/* for every item in regimentNames */
for i in regimentNames:
    /* capitalize the item and add it to regimentNamesCapitalized_f */
/* View the outcome */

Using Map()

Create a lambda function that capitalizes x

capitalizer = lambda x: x.upper()

Map the capitalizer function to regimentNames, convert the map into a list, and view the variable

regimentNamesCapitalized_m = list(map(capitalizer, regimentNames)); regimentNamesCapitalized_m

Using List Comprehension

Apply the expression x.upper to each item in the list called regiment names. Then view the output

regimentNamesCapitalized_l = [x.upper() for x in regimentNames]; regimentNamesCapitalized_l


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