Massive renaming!

22-tantrum/README.md

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+Style #21
+==============================
+
+Constraints:
+
+- Every single procedure and function checks the sanity of its
+  arguments and refuses to continue when the arguments are
+  unreasonable
+
+- All code blocks check for all possible errors, possibly print out
+  context-specific messages when errors occur, and pass the errors
+  up the function call chain
+
+Possible names:
+
+- Tantrum
+- Design by contract
+- Mental breakdown

22-tantrum/tf-22.py

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+#!/usr/bin/env python
+import sys, re, operator, string, traceback
+
+#
+# The functions
+#
+def extract_words(path_to_file):
+    assert(type(path_to_file) is str), "I need a string!" 
+    assert(path_to_file), "I need a non-empty string!" 
+
+    try:
+        with open(path_to_file) as f:
+            str_data = f.read()
+    except IOError as e:
+        print("I/O error({0}) when opening {1}: {2}! I quit!".format(e.errno, path_to_file, e.strerror))
+        raise e
+    
+    pattern = re.compile('[\W_]+')
+    word_list = pattern.sub(' ', str_data).lower().split()
+    return word_list
+
+def remove_stop_words(word_list):
+    assert(type(word_list) is list), "I need a list!"
+
+    try:
+        with open('../stop_words.txt') as f:
+            stop_words = f.read().split(',')
+    except IOError as e:
+        print("I/O error({0}) when opening ../stops_words.txt: {1}! I quit!".format(e.errno, e.strerror))
+        raise e
+
+    stop_words.extend(list(string.ascii_lowercase))
+    return [w for w in word_list if not w in stop_words]
+
+def frequencies(word_list):
+    assert(type(word_list) is list), "I need a list!"
+    assert(word_list != []), "I need a non-empty list!"
+
+    word_freqs = {}
+    for w in word_list:
+        if w in word_freqs:
+            word_freqs[w] += 1
+        else:
+            word_freqs[w] = 1
+    return word_freqs
+
+def sort(word_freq):
+    assert(type(word_freq) is dict), "I need a dictionary!"
+    assert(word_freq != {}), "I need a non-empty dictionary!"
+
+    try:
+        return sorted(word_freq.items(), key=operator.itemgetter(1), reverse=True)
+    except Exception as e:
+        print("Sorted threw {0}".format(e))
+        raise e
+
+#
+# The main function
+#
+try:
+    assert(len(sys.argv) > 1), "You idiot! I need an input file!"
+    word_freqs = sort(frequencies(remove_stop_words(extract_words(sys.argv[1]))))
+
+    assert(type(word_freqs) is list), "OMG! This is not a list!"
+    assert(len(word_freqs) > 25), "SRSLY? Less than 25 words!"
+    for (w, c) in word_freqs[0:25]:
+        print(w, ' - ', c)
+except Exception as e:
+    print("Something wrong: {0}".format(e))
+    traceback.print_exc()
+