Elso hazi

basic/list1.py

@@ -22,8 +22,12 @@
 # Note: python does not have a ++ operator, but += works.
 def match_ends(words):
     # +++your code here+++
-    return
-
+    szamlalo=0
+    for elem in words:
+        if len(elem)>=2 and elem[0]==elem[-1]:
+            szamlalo+=1
+
+    return szamlalo
 
 # B. front_x
 # Given a list of strings, return a list with the strings
@@ -34,7 +38,15 @@ def match_ends(words):
 # before combining them.
 def front_x(words):
     # +++your code here+++
-    return
+    x_lista = []
+    nem_x_lista = []
+    for elem in words:
+        if elem[0] == 'x':
+            x_lista.append(elem)
+        else:
+            nem_x_lista.append(elem)
+
+    return sorted(x_lista) + sorted(nem_x_lista)
 
 
 # C. sort_last
@@ -45,7 +57,15 @@ def front_x(words):
 # Hint: use a custom key= function to extract the last element form each tuple.
 def sort_last(tuples):
     # +++your code here+++
-    return
+	sorted_tuples=[0 for i in range(len(tuples))]
+	szamok=[]
+	for elem in tuples:
+		szamok.append(elem[-1])
+	sorted_szamok=sorted(szamok)
+	for elem in tuples:
+		sorted_tuples[sorted_szamok.index(elem[-1])]=elem
+
+    return sorted_tuples
 
 
 # Simple provided test() function used in main() to print

basic/list2.py

@@ -14,7 +14,13 @@
 # modify the passed in list.
 def remove_adjacent(nums):
     # +++your code here+++
-    return
+	l = []
+    for i in range(len(nums)-1):
+        if nums[i] != nums[i+1]:
+            l.append(nums[i])
+        if i == len(nums)-2:
+            l.append(nums[i+1])
+    return l
 
 
 # E. Given two lists sorted in increasing order, create and return a merged
@@ -23,7 +29,7 @@ def remove_adjacent(nums):
 # pass of both lists.
 def linear_merge(list1, list2):
     # +++your code here+++
-    return
+    return sorted(list1+list2)
 
 
 # Note: the solution above is kind of cute, but unforunately list.pop(0)

basic/string1.py

@@ -25,7 +25,10 @@
 # and donuts(23) returns 'Number of donuts: many'
 def donuts(count):
     # +++your code here+++
-    return
+    if count < 10:
+		return 'Number of donuts: ' + str(count)
+	else:
+		return 'Number of donuts: many'
 
 
 # B. both_ends
@@ -35,7 +38,7 @@ def donuts(count):
 # is less than 2, return instead the empty string.
 def both_ends(s):
     # +++your code here+++
-    return
+    return s[:2]+s[-2:]
 
 
 # C. fix_start
@@ -49,7 +52,9 @@ def both_ends(s):
 # where all instances of stra have been replaced by strb.
 def fix_start(s):
     # +++your code here+++
-    return
+    sztring=s[1:]
+	a=sztring.replace(s[0],'*')
+	return s[0]+a
 
 
 # D. MixUp
@@ -61,7 +66,7 @@ def fix_start(s):
 # Assume a and b are length 2 or more.
 def mix_up(a, b):
     # +++your code here+++
-    return
+    return b[:2]+a[2:]+' '+a[:2]+b[2:]
 
 
 # Provided simple test() function used in main() to print

basic/string2.py

@@ -17,7 +17,12 @@
 # Return the resulting string.
 def verbing(s):
     # +++your code here+++
-    return
+	if s[-3:]=='ing:
+		return s[:-3]+'ly'
+	elif len(s)<3:
+		return s
+	else:
+		return s+'ing'
 
 
 # E. not_bad
@@ -30,7 +35,10 @@ def verbing(s):
 # This dinner is good!
 def not_bad(s):
     # +++your code here+++
-    return
+	not_index=s.find('not')
+	bad_index=s.find('bad')
+
+    return s[:not_index]+'good'+s[bad_index+3:]
 
 
 # F. front_back
@@ -42,7 +50,14 @@ def not_bad(s):
 #  a-front + b-front + a-back + b-back
 def front_back(a, b):
     # +++your code here+++
-    return
+    def splits(x):
+        if len(x)%2==0:
+            half = len(x)/2
+            return [x[:int(half)],x[int(half):]]
+        else:
+            half = len(x)/2
+            return [x[:int(half)+1],x[int(half)+1:]]
+    return splits(a)[0]+splits(b)[0]+splits(a)[1]+splits(b)[1]
 
 
 # Simple provided test() function used in main() to print