add_fraction function added

Author: JohnTso

fraction/add_fraction.py

@@ -0,0 +1,35 @@
+import sys
+sys.path.insert(0, '/Users/petertso/Code/Math/factor')
+from get_lcm import get_lcm
+from simplify_fraction import simplify_fraction
+
+def add_fraction(*fractions):
+    """
+    >>> add_fraction('1/2','2/4')
+    1/1
+    >>> add_fraction('3/2','1/4','1/0')
+    divided by zero error
+    """
+
+    # this sorts out the numerators and denominators
+    fractions = list(fractions)
+    nums = [i.replace('/', ' ').split() for i in fractions]
+    numerators = [int(i[0]) for i in nums]
+    denominators = [int(i[1]) for i in nums]
+
+    # return error when divided by zero
+    if 0 in denominators:
+        return "divided by zero error"
+    
+    # get lcm of the denominators, add them up
+    lcm = get_lcm(denominators)
+
+    result_deno = 0
+    result_num = 0
+    for i in range(len(denominators)):
+        num = lcm // denominators[i]
+        result_deno = denominators[i] * num
+        result_num += numerators[i] * num
+
+    # return the simplified fraction
+    return simplify_fraction(f"{result_num}/{result_deno}")

fraction/simplify_fraction.py

@@ -19,5 +19,4 @@ def simplify_fraction(fraction):
     # this will divide both numerator and denominator by their gcf value
     gcf = get_gcf(nums)
     nums = [str(i // gcf) for i in nums]    
-    print(nums)
     return "/".join(nums)