added 2. week homeworks

Week2 _hmwrk_1 copy.py

@@ -0,0 +1,11 @@
+def shift_list(list_, a):
+    if a >= 0:
+        return list_[-a:] + list_[:-a]
+    else:
+        a = abs(a)
+        return list_[a:] + list_[:a]
+
+#Check the function 
+check_func = ['a', 'b', 'c', 'd', 'e', 'f']
+print(shift_list(check_func, 4)) 
+print(shift_list(check_func, -4))

Week2 _hmwrk_1.py

@@ -0,0 +1,11 @@
+def shift_list(list_, a):
+    if a >= 0:
+        return list_[-a:] + list_[:-a]
+    else:
+        a = abs(a)
+        return list_[a:] + list_[:a]
+
+#Check the function 
+check_func = ['a', 'b', 'c', 'd', 'e', 'f']
+print(shift_list(check_func, 4)) 
+print(shift_list(check_func, -4))

Week2_hmwrk_2 copy.py

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+text = input("Enter a text: ")
+
+# creating an empty dictionary to store letter counts
+letter_counts = {}
+
+# For loop and iterate through each letter in the text
+for letter in text:
+    # ignore spaces and convert letter to lowercase
+    if letter != ' ':
+        letter = letter.lower()
+        # if the letter is already in the dictionary, increase the counting
+        if letter in letter_counts:
+            letter_counts[letter] += 1
+        # or else, add the letter to the dictionary with a count of 1
+        else:
+            letter_counts[letter] = 1
+
+# items() for getting the elemnets as pairs, sort() for getting the alphabetic order
+letter_counts_list = list(letter_counts.items())
+letter_counts_list.sort()
+print(letter_counts_list)

Week2_hmwrk_2.py

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+text = input("Enter a text: ")
+
+# creating an empty dictionary to store letter counts
+letter_counts = {}
+
+# For loop and iterate through each letter in the text
+for letter in text:
+    # ignore spaces and convert letter to lowercase
+    if letter != ' ':
+        letter = letter.lower()
+        # if the letter is already in the dictionary, increase the counting
+        if letter in letter_counts:
+            letter_counts[letter] += 1
+        # or else, add the letter to the dictionary with a count of 1
+        else:
+            letter_counts[letter] = 1
+
+# items() for getting the elemnets as pairs, sort() for getting the alphabetic order
+letter_counts_list = list(letter_counts.items())
+letter_counts_list.sort()
+print(letter_counts_list)

Week2_hmwrk_3 copy.py

@@ -0,0 +1,10 @@
+def shared_letters(w1, w2):
+    set1 = set(w1)
+    set2 = set(w2)
+    shared = set1 & set2    # intersection
+    unique1 = set1 - set2   # difference
+    unique2 = set2 - set1   # difference
+    return [''.join(sorted(shared)), ''.join(sorted(unique1)), ''.join(sorted(unique2))]
+
+# test the function
+print(shared_letters("strong", "strength")) # ['strng', 'o', 'eh']

Week2_hmwrk_3.py

@@ -0,0 +1,9 @@
+def shared_letters(w1, w2):
+    set1 = set(w1)
+    set2 = set(w2)
+    shared = set1 & set2    # intersection
+    unique1 = set1 - set2   # difference
+    unique2 = set2 - set1   # difference
+    return [''.join(sorted(shared)), ''.join(sorted(unique1)), ''.join(sorted(unique2))]
+
+print(shared_letters("strong", "strength"))