Extract Methods Practice Problems

Zipfile with Problems: extract-methods.zip
Zipfile with Problems and Answers: extract-methods-ans.zip

For each problem, extract a method with the given name and action.
In each case, the extracted method body should not include the input statement or the output (print) statement
Write traditional and unit test scripts to test each method.

Method Name: convert_in_to_cm
Action: Convert inches to centimeters:

inches = float(input("Enter length in inches: "))
cm = inches * 2.54
print("Length in cm is:", cm)

Method Name: convert_ft_in_to_m
Action: Convert feet and inches to meters:

feet = float(input("Enter length in feet: "))
inches = float(input("Enter additional inches: "))
cm = (feet * 12 + inches) * 2.54
meters = cm / 100
print("Length in meters is:", meters)

Method Name: first_character
Action: Return first character of a string.

word = input("Input word: ")
if len(word) > 0:
   first = word[0]
else:
   first = ""
print("First character:", first)

Method Name: find_factors
Action: Return list of all factors of an int:

n = int(input("Input a positive int: "))
factors = [1]
for f in range(2, n):
    if n % f == 0:
        factors.append(f)
        
factors.append(n)
print("Factors of n:", factors)

Method Name: load_list1
Input File: values1.txt
Action: Return list consisting of int values read from a file, one values per line:

file_name = input("Input file name:")
fin = open(file_name, "r")
values = [ ]
for line in fin:
    value = int(line)
    values.append(value)
    
print("List of values: ", values)

Method Name: load_list_of_lists
Input File: values2.txt
Action: Return list of lists consisting of int values read from a file, multiple values per line:

file_name = input("Input file name: ")
fin = open(file_name, "r")
values = [ ]
for line in fin:
    row = [ ]
    items = line.split(" ")
    for item in items:
        value = int(item.strip( ))
        row.append(value)
    values.append(row)
fin.close( )

print("List of values: ", values)