More changes

src/examples_in_my_book/sorting/bubble_sort.py

@@ -1,10 +1,19 @@
 #!/usr/bin/python3
-# mari von steinkirch @2013
-# steinkirch at gmail
+
+#  Mari von Steinkirch @ 2013
+# mari.wahl9@gmail.com
+
+# Bernardo Sulzbach (mafagafo) @ 2014
+# 1449441@gmail.com
 
 
 def bubble_sort(seq):
-    ''' implement bubble sort, a O(n^2) not efficient algorithm'''
+    """
+    Implementation of bubble sort.
+    O(n²) and thus highly ineffective.
+    :param seq: the sequence to be sorted.
+    :return: the sorted sequence.
+    """
     size = len(seq) -1
     for num in range(size, 0, -1):
         for i in range(num):
@@ -13,7 +22,6 @@ def bubble_sort(seq):
                 seq[i] = seq[i+1]
                 seq[i+1] = temp
     return seq
-    
 
 
 def test_bubble_sort(module_name='this module'):

src/further_examples/arrays_and_strings/reverse_str.py

@@ -1,4 +1,6 @@
-# Mari von Steinkirch @ 2013
+#!/usr/bin/python3
+
+#  Mari von Steinkirch @ 2013
 # mari.wahl9@gmail.com
 
 # Bernardo Sulzbach (mafagafo) @ 2014

src/further_examples/arrays_and_strings/reverse_words.py

@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+
+# Mari von Steinkirch @ 2013
+# mari.wahl9@gmail.com
+
+# Bernardo Sulzbach (mafagafo) @ 2014
+# 1449441@gmail.com
+
+
+def reverse_words(string):
+    """
+    Reverse the order of the words in a sentence.
+    :param string: the string which words wil lbe reversed.
+    :return: the reversed string.
+    """
+    l1 = string.split(' ')
+    l1.reverse()
+    return ' '.join(l1)
+
+
+def reverse_words_brute(string):
+    """
+    Reverse the order of the words in a sentence.
+    :param string: the string which words wil lbe reversed.
+    :return: the reversed string.
+    """
+    word, sentence = [], []
+    for character in string:
+        if character != ' ':
+            word.append(character)
+        else:
+            # So we do not keep multiple whitespaces. An empty list evaluates to False.
+            if word:
+                sentence.append(''.join(word))
+            word = []
+    # So we do not keep multiple whitespaces. An empty list evaluates to False.
+    if word != '':
+        sentence.append(''.join(word))
+    sentence.reverse()
+    return ' '.join(sentence)
+
+if __name__ == '__main__':
+    phrase = 'I love  Google,   Fedora  & Python!'
+    print(reverse_words(phrase))
+    print(reverse_words_brute(phrase))

src/further_examples/arrays_and_strings/reverse_words_setence.py

@@ -1,44 +0,0 @@
-#!/usr/bin/python3
-# mari von steinkirch @2013
-# steinkirch at gmail
-
-''' reverse words in a setence, keeping the words right 
-   >>> str1 = 'I love Google and Python!'
-   >>> reverse_words(str1)
-   'Python! and Google love I'
-   >>> reverse_words('bla')
-   'bla'
-   >>> reverse_words('')
-   ''
-   >>> reverse_words_brute(str1)
-   'Python! and Google love I'
-   >>> reverse_words_brute('bla')
-   'bla'
-   >>> reverse_words_brute('')
-   ''
-'''
-
-def reverse_words(str1):
-    l1 = str1.split(' ')
-    l1.reverse()
-    return ' '.join(l1)
-    
-def reverse_words_brute(str1):
-    aux_lt = []
-    aux_str = ''
-    for i, c in enumerate(str1):
-        if c != ' ':
-            aux_str += c    # WE COULD HAVE USED LT HERE, MORE EFFICIENT
-        elif c == ' ':
-            aux_lt.append(aux_str)  # WE COULD HAVE USED STR BUT NOT EFFICIENT!
-            aux_str = ''
-    aux_lt.append(aux_str) # REMEMBER THAT THE LAST ONE DOEN'T HAVE SPACE!
-    aux_lt.reverse()   
-    return ' '.join(aux_lt)
-
-    
-
-if __name__ == '__main__':
-    import doctest
-    doctest.testmod()
-

src/further_examples/useful/version_info.py

@@ -3,7 +3,7 @@ print("System version:", sys.version, '\n')
 
 try:
     import numpy
-    print("\nNumpy version:", numpy.version.version)
+    print("\nNumpy version:", numpy.__version__)
 except ImportError as e:
     print(e)