Adding controlflow

Author: TomTaylorLondon

Beginers/ControlFlow/problem.py

@@ -0,0 +1,62 @@
+"""
+Write a program which returns 'Positive' 'Zero' or 'Negative' when given a number
+"""
+
+
+def what_sign(n):
+    pass
+
+
+def test_what_sign(n):
+    assert what_sign(3) == 'Positive'
+    assert what_sign(0) == 'Zero'
+    assert what_sign(-3) == 'Negative'
+
+"""
+Write a program that prints the integers from 1 to 100.
+
+But for multiples of three print "Fizz" instead of the number, and for the multiples of five print "Buzz".
+For numbers which are multiples of both three and five print "FizzBuzz".
+"""
+
+def fizzbuzz():
+    pass
+
+"""
+Write a function which removes one or more indicies from a list.
+
+For example given the list:
+["John", "Bob", "Charles", "Trev"]
+and the indices:
+[1, 2]
+the resulting list will be:
+["John", "Trev"]
+"""
+
+def remove_indices(mylist, idxs):
+    pass
+
+def test_remove_indices():
+    assert remove_indices(["John", "Bob", "Charles", "Trev"], [0]) == ["Bob", "Charles", "Trev"]
+    assert remove_indices(["John", "Bob", "Charles", "Trev"], [1, 2]) == ["John", "Trev"]
+
+
+""""
+Modify connect to handle failed connections
+"""
+import random
+
+
+def open_connection():
+    if random.randint(0, 3) != 0:
+        raise ValueError('failed to connect')
+    return True
+
+
+def connect(nretry=100):
+    for _ in xrange(nretry):
+        # handle bad connection here...
+        if open_connection():
+            return
+
+connect()

Beginers/ControlFlow/solution.py

@@ -0,0 +1,84 @@
+"""
+Write a function 'what_sign' which returns 'Positive' 'Zero' or 'Negative' when given a number
+"""
+
+def what_sign(n):
+    if n > 0:
+        return 'Positive'
+    elif n < 0:
+        return 'Negative'
+    else:
+        return 'Zero'
+
+
+def test_what_sign(n):
+    assert what_sign(3) == 'Positive'
+    assert what_sign(0) == 'Zero'
+    assert what_sign(-3) == 'Negative'
+
+"""
+Write a function 'fizzbuzz' that prints the integers from 1 to 100.
+
+But for multiples of three print "Fizz" instead of the number, and for the multiples of five print "Buzz".
+For numbers which are multiples of both three and five print "FizzBuzz".
+"""
+
+def fizzbuzz():
+    for num in xrange(1,101):
+        msg = ''
+        if num % 3 == 0:
+            msg += 'Fizz'
+        if num % 5 == 0:
+            msg += 'Buzz'
+        else:
+            msg = str(num)
+        print msg
+
+"""
+Write a function 'remove_indices' which removes one or more indicies from a list.
+
+For example given the list:
+["John", "Bob", "Charles", "Trev"]
+and the indices:
+[1, 2]
+the resulting list will be:
+["John", "Trev"]
+"""
+
+
+def remove_indices(mylist, idxs):
+    result = []
+    for i, l in enumerate(mylist):
+        if i not in idxs:
+            result.append(l)
+    return result
+
+
+def test_remove_indices():
+    assert remove_indices(["John", "Bob", "Charles", "Trev"], [0]) == ["Bob", "Charles", "Trev"]
+    assert remove_indices(["John", "Bob", "Charles", "Trev"], [1, 2]) == ["John", "Trev"]
+
+
+""""
+Modify connect to handle failed connections
+"""
+import random
+
+
+def open_connection():
+    if random.randint(0, 3) != 0:
+        raise ValueError('failed to connect')
+    return True
+
+
+def connect(nretry=100):
+    for _ in xrange(nretry):
+        try:
+            if open_connection():
+                return
+        except ValueError:
+            continue
+
+
+if "__main__" in __name__:
+    connect()