refactor(icake): refactor p37 rand5() from rand7()

Author: Jessica Yung

interview-cake/p37.py

@@ -3,22 +3,25 @@
 generates a random integer from 1 to 5.
 """
 import numpy as np
+
+
 def rand7():
     return int(np.random.random()*7+1)
 
+
 def rand5():
     result = 7
     while result > 5:
         result = rand7()
     return result
 
+
 def rand5_v1():
     stop = False
 
-    while stop == False:
+    while stop is False:
         num = rand7()
         if num <= 5:
-            stop = True
             return num
 
 # Test rand7():

interview-cake/p38.py

@@ -0,0 +1,5 @@
+"""
+You have a function rand5() that generates a random integer from 1 to 5. Use it to write a function rand7() that
+generates a random integer from 1 to 7.
+
+"""