finish three 6kyu , one beta

Author: sdwh

[6 kyu]Custom Array Filters.py

@@ -0,0 +1,13 @@
+class list(object):
+    def __init__(self, arg):
+        self.arg = [c for c in arg if isinstance(c,int)]
+    def even(self):
+        return [n for n in self.arg if n % 2 == 0]
+    def odd(self):
+        return [n for n in self.arg if n % 2 != 0]
+    def under(self,num):
+        return [n for n in self.arg if n < num]
+    def over(self,num):
+        return [n for n in self.arg if n > num]
+    def in_range(self,min,max):
+        return [n for n in self.arg if n >= min and n <= max]

[6 kyu]Secret Message.py

@@ -0,0 +1,12 @@
+def find_secret_message(paragraph):
+    paragraph = ''.join([c for c in paragraph.lower() if c in 'abcdefghijklmnopqrstuvwxyz -'])
+    appear,res = [],[]
+    for word in paragraph.split():
+        if word not in appear:
+            appear.append(word)
+        elif word not in res:
+            res.append(word)
+    return ' '.join(res)
+
+
+print(find_secret_message('asdf qwer zxcv. zxcv fdsa rewq. qazw asdf sxed. qwer crfv.'))

[6 kyu]Unary function chainer.py

@@ -0,0 +1,19 @@
+def chained(f):
+    z = lambda x:x
+    for func in f:
+        func(z)
+        return z
+         
+
+
+
+
+def f1(x): return x*2
+def f2(x): return x+2
+def f3(x): return x**2
+def f4(x): return x.split()
+def f5(xs): return [x[::-1].title() for x in xs]
+def f6(xs): return "_".join(xs)
+
+print(chained([f1,f2,f3])(0)) #4 
+

[beta]Vasya - Clerk.py

@@ -0,0 +1,23 @@
+def tickets(people):
+    cashier = {100:0,50:0,25:0}
+    for pay in people:
+        if pay == 25:
+            cashier[25] += 1
+        elif pay == 50:
+            if cashier[25] == 0:
+                return 'NO'
+            cashier[50] += 1
+            cashier[25] -= 1
+        else:
+            cashier[100] += 1
+            if cashier[50] >= 1 and cashier[25] >= 1:
+                cashier[50] -= 1
+                cashier[25] -= 1
+            elif cashier[25] >= 3:
+                cashier[25] -= 3
+            else:
+                return 'NO'
+    return 'YES'
+
+
+print(tickets([25,25,25,100,25,50]))