[Python #8] create e41.py

kjg/python-the-hard-way/e41.py

@@ -0,0 +1,87 @@
+import random
+from urllib.request import urlopen
+import sys
+
+WORD_URL = "http://learncodethehardway.org/words.txt"
+WORDS = []
+
+PHRASES = {
+    "class %%%(%%%):":
+    "Make a class named %%% that is-a %%%.",
+    "class %%%(object):\n\tdef __init__(self, ***)" :
+    "class %%% has-a __init__ that takes self and *** params.",
+    "class %%%(object):\n\tdef ***(self, @@@)":
+    "class %%% has-a function *** that takes self and @@@ params.",
+    "*** = %%%()":
+    "Set *** to an instance of class %%%.",
+    "***.***(@@@)":
+    "From *** get the *** function, call it with params self, @@@.",
+    "***.*** = '***'":
+    "From *** get the *** attribute and set it to '***'."
+}
+
+# do they want to drill phrases first
+if len(sys.argv) == 2 and sys.argv[1] == "english":
+    PHRASE_FIRST = True
+else:
+    PHRASE_FIRST = False
+
+
+# load up the words from the website
+for word in urlopen(WORD_URL).readlines():
+    WORDS.append(str(word.strip(), encoding="utf-8"))
+
+
+def convert(snippet, phrase):
+    class_names = [w.capitalize() for w in
+                   random.sample(WORDS, snippet.count("%%%"))]
+    other_names = random.sample(WORDS, snippet.count("***"))
+    results = []
+    param_names = []
+
+    for i in range(0, snippet.count("@@@")):
+        param_count = random.randint(1,3)
+        param_names.append(', '.join(
+            random.sample(WORDS, param_count)))
+
+    for sentence in snippet, phrase:
+        # this is how you duplicate a list or string
+        result = sentence[:]
+
+        # fake class names
+        for word in class_names:
+            result = result.replace("%%%", word, 1)
+
+        # fake other names
+        for word in other_names:
+            result = result.replace("***", word, 1)
+
+        # fake parameter lists
+        for word in param_names:
+            result = result.replace("@@@", word, 1)
+
+        results.append(result)
+    return results
+
+
+# keep going until they hit CTRL-D
+try:
+    while True:
+        snippets = list(PHRASES.keys())
+        random.shuffle(snippets)
+
+        for snippet in snippets:
+            phrase = PHRASES[snippet]
+            question, answer = convert(snippet, phrase)
+            if PHRASE_FIRST:
+                question, answer = answer, question
+
+                print(question)
+                input("> ")
+                print(f"ANSWER:  {answer}\n\n")
+                
+except EOFError:
+    print("\nBye")
+
+
+

kjg/python.org

@@ -145,3 +145,5 @@ How to use dictionary
 *** Python #8
 **** ex40
 How to use class
+**** ex41
+practice class