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--- python:python [2014/05/23 00:59] – [Python] dblume
+++ python:python [2023/10/28 00:07] (current) – dblume
@@ Line 1: / Line 1: @@
-====== Python ======
+====== General Python Notes ======
 Man, there's too much to do and note.  Logging some stuff to investigate later...
@@ Line 9: / Line 9: @@
   * Of course, there's [[:xampp|getting Python running under Xampp]].
   * There's [[http://www.infoworld.com/d/application-development/pillars-python-six-python-web-frameworks-compared-169442|A comparison of CubicWeb, Django, Pyramid, Web.py, Web2py, and Zope 2]]
-  * Look into the microframework [[http://flask.pocoo.org/|Flask]]. Here's a [[http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world|tutorial on making a blog with it]].
+  * Look into the microframework [[http://flask.pocoo.org/|Flask]]. Here's a [[http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world|tutorial on making a blog with it]]. Consider flask with gunicorn and nginx.
   * [[https://dataset.readthedocs.org/en/latest/|dataset]], an abstraction layer above relational databases.
   * [[http://docopt.org/|docopt]] for a stupidly easy and correct command-line interface description language.
   * [[http://stevenloria.com/python-best-practice-patterns-by-vladimir-keleshev-notes/|Best practices]] by Vladimir Keleshev.
   * [[https://twitter.com/brandon_rhodes/status/449938490516860928|You can ask a new-style class for its .__subclasses__()]] It uses weak references. Look at [[https://gist.github.com/etrepum/9862280|this interesting example with a child class inside a method]].
+  * A Power Point deck by Alex Martelli describing [[http://www.aleax.it/yt_pydi.pdf|Dependency Injection vs. Template Method (override base method) vs. Monkey Patching]].
+  * [[http://stackoverflow.com/questions/101268/hidden-features-of-python|Hidden Features of Python]] at StackOverflow
+  * [[http://chriskiehl.com/article/parallelism-in-one-line|Parallelism in one line]]
 Would be nice to create a binary search in text files in Python.  Maybe based on an answer deep in [[http://stackoverflow.com/questions/744256/reading-huge-file-in-python|Reading Huge File in Python]].
@@ Line 247: / Line 250: @@
         fcntl.flock(f, fcntl.LOCK_UN)
 </code>
+====== Various Approaches to threaded URL Requests ======
+  * [[https://stackoverflow.com/questions/2632520/what-is-the-fastest-way-to-send-100-000-http-requests-in-python|Use Queue and threading's Thread]]
+  * [[https://www.shanelynn.ie/using-python-threading-for-multiple-results-queue/|Use threading and store results in a pre-allocated list]]. Then use Queue for lots of URLs.
+  * [[https://dev.to/rhymes/how-to-make-python-code-concurrent-with-3-lines-of-code-2fpe|Use concurrent.futures' ThreadPoolExecutor and map()]].
+  * Or, use the doc's [[https://docs.python.org/3/library/concurrent.futures.html#threadpoolexecutor-example|ThreadPoolExecutor Example]].
+  * And, as mentioned in Parallelism in One Line, [[https://chriskiehl.com/article/parallelism-in-one-line|multiprocessing.dummy's Pool and its own map()]].
 ====== Fibonacci Generator with Itertools ======
@@ Line 268: / Line 279: @@
 #    for i in range( 5 ):
 #        print i, fib( i )
+</code>
+====== Parse C++ Code with nm and graphviz's dot ======
+<code bash>
+sudo apt-get install graphviz
+</code>
+<code python>
+    # Read `nm` output
+    output = subprocess.check_output(['nm', '--demangle', entry.path]).decode('utf-8')
+    for line in output.split('\n'):
+        if 'Singleton' in line:
+    # Make a .dot file
+    with open(filename + '.dot', 'w') as file:
+        file.write('digraph {\n')
+        for f, destinations in self.graph.items():
+            for d in destinations:
+                file.write(f'  "{f}" -> "{d}"\n')
+def create_png_image(filename):
+    with open(filename + '.png', 'wb') as fout:
+        p1 = subprocess.run(['dot', filename + '.dot', '-Tpng'], stdout=fout)
 </code>