Question

Python Language

Create a module (1 mark)

a) Create a function that takes three (3) arguments (1 mark)

i) Name it whatever you’d like (1 mark)

ii) It will return a dictionary with the following keys (1 mark)

(1) Error => gives error message or empty string if not (1 mark)

(2) Result => gives result or empty string if no result (1 mark)

b) Ensure that all three arguments are of String (str) datatype (1 mark)

i) Return an error if not the case (1 mark)

c) Determine which of the three arguments has the greatest string length (3 marks)

i) Return the result (1 mark)

d) Write the code that will automatically run your function created in Step 1)

a) if it is the MAIN module. (1 mark)

Answer 1

=============================== python code as per the instruction given ===================

def MyFunction(arg1,arg2,arg3):#function fefined
myDict = dict()#dictionary defined
myDict['Error'] = 'Error Message'#default message
myDict['Result'] = 'Return result'#default message
error=''#stores error
result=''#stores result
  
# type checking---------------------------------------
if not type(arg1)==str:
error+='argument 1 is not a string '
if not type(arg2)==str:
error+='argument 2 is not a strng '
if not type(arg3)==str:
error+='argument 3 is not a string '
myDict['Error'] = error
  
# calculating result----------------------------------
if error!='':
myDict['Result'] = result
return myDict
len1 = len(arg1)
len2 = len(arg2)
len3 = len(arg3)
if len1>len2:
result = arg1
elif len2>len3:
result = arg2
else:
result = arg3
myDict['Result'] = result
return myDict
# main function entry point:
if __name__ == '__main__':
arg1 = 'arg1'
arg2 = 'argument2'
arg3 = 'arg3bro'
myDict = MyFunction(arg1,arg2,arg3)
print(myDict)
arg1 = 6
arg2 = 'argument2'
arg3 = 'arg3bro'
myDict = MyFunction(arg1,arg2,arg3)
print(myDict)

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screenshots of the code and the output:

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