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--- public:t-malv-15-3:3 [2015/09/03 10:17] – [2. myscript.py: argv] orvark
+++ public:t-malv-15-3:3 [2024/04/29 13:33] (current) – external edit 127.0.0.1
@@ Line 31: / Line 31: @@
 <code>
 $ python myscript.py One TWO three
-['lab3-1.py', 'One', 'TWO', 'three']
+['myscript.py', 'One', 'TWO', 'three']
 </code>
@@ Line 60: / Line 60: @@
 ===== 3. mytokenize.py: Read file =====
-**Create a script name ''tokenize.py'' that reads a file contents, tokenizes them, removes stopwords and print out the remaining tokens, one per line.**
+**Create a script name ''mytokenize.py'' that reads a file contents, tokenizes them, removes stopwords and print out the remaining tokens, one per line.**
 <code python>
@@ Line 69: / Line 69: @@
 #Get file name from argv (see problem 3).
 #Open file for reading.
-#Read contents into string.
+#Read contents into a string.
 #Tokenize the string.
 #Remove stopwords (words in stopwords.words('english')).
@@ Line 75: / Line 75: @@
 </code>
-You should be able to invoke the script using ''python tokenize.py test.txt''.
+You should be able to invoke the script using ''python mytokenize.py test.txt''.
@@ Line 128: / Line 128: @@
 **If you feel this problem is easy you should also try your hand at problems 31 and 41.**
+===== Possible Solutions =====
+<code python>
+#1
+>>> monty[::-1] == 'nohtyP ytnoM'
+True
+#2
+from sys import argv
+print('Number of parameters: ', len(argv)-1)
+print('Script name: ', argv[0])
+print('First parameter: ', argv[1])
+print('Second parameter: ', argv[2])
+#3
+from sys import argv
+from nltk import word_tokenize
+from nltk.corpus import stopwords
+with open(argv[1]) as infile:
+    for w in word_tokenize(infile.read()):
+        if w.lower() not in stopwords.words('english'):
+            print(w)
+#Since files are context managers, they can be used in a with-statement.
+#The file will close when the code block is finished, even if an exception occurs
+#4
+from sys import argv
+from codecs import encode
+with open(argv[1]) as infile, open(argv[2], 'w') as outfile:
+    for line in infile:
+        outfile.write(encode(line, 'rot_13'))
+#5
+[(w, len(w)) for w in sent]
+</code>