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Program is −

def string_test(s):a = { ''Lower_Case'':0 , ''Upper_Case'':0} #intiail count of lower and upperfor ch in s: #for loop   if(ch.islower()): #if-elif-else condition      a[''Lower_Case''] = a[''Lower_Case''] + 1   elif(ch.isupper()):      a[''Upper_Case''] = a [''Upper_Case''] + 1   else:      passprint(''String in testing is: '',s) #printing the statements.print(''Number of Lower Case characters in String: '',a[''Lower_Case''])print(''Number of Upper Case characters in String: '',a[''Upper_Case''])

Output −

string_test(''Tutorials POINT'')

String in testing is: Tutorials POINT

Number of Lower Case characters in String: 8

Number of Upper Case characters in String: 6

We make use of the methods .islower() and .isupper(). We initialise the count for lower and upper. Using if and else condition we calculate total number of lower and upper case characters.

Program for sum of all the numbers in list is −

def sum(numbers):   total = 0   for num in numbers:      total+=num   print(''Sum of the numbers: '', total)sum((100, 200, 300, 400, 0, 500))

We define a function ‘sum’ with numbers as parameter. The in for loop we store the sum of all the values of list.

upper() − Converts all lowercase letters in string to uppercase.

lstrip() − Removes all leading whitespace in string.

lower() − Converts all uppercase letters in string to lowercase.

ljust(width[, fillchar]) − Returns a space-padded string with the original string left-justified to a total of width columns.

len(string) − Returns the length of the string.