memory - creating different objects or the same depending on the type(basic python) -

-

इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 5 जवाब

मैंने पढ़ा है कि कैसे अजगर ऑब्जेक्ट बनाता है और उन लोगों के लिए "टैग" डालता है जो उस आवंटित चर के रूप में होते हैं। हालांकि, मुझे लगता है कि अगर दो स्ट्रिंग या पूर्णांक समान मूल्यों के साथ हैं, तो यह केवल एक मेमोरी स्थान को आवंटित करता है, सूचियों, ट्यूपल्स, डीआईसीएस के विपरीत। क्या कोई नियम या प्रकार की सूची होती है जब एक मामला होता है लेकिन दूसरा नहीं? विशेष रूप से, अगर मैं 

 > gt; & gt; & gt; एक्स, वाई = 'ए', 'ए' & gt; & gt; & gt; एक्स है y सत्य है & gt; & gt; X, y = 1,1> gt; & gt; & gt; एक्स सच है

लेकिन दूसरी ओर, अगर मैं करता हूं 

 > gt; & gt; X, y = {'a': 1}, {'a': 1}> & gt; & gt; X है y झूठी और gt; & gt; & gt; X, y = (1,), (1,) & gt; & gt; & gt; X है y झूठी और gt; & gt; & gt; X, y = [1], [1]> gt; & gt; & gt; पायथन में स्ट्रिंग्स अपरिवर्तनीय हैं और पुन: उपयोग किए जा रहे हैं। X, y


Comments

Post a Comment

Popular posts from this blog

Active Directory Authenticated Proxy Server with Squid or CNTLM -

-
I need to configure a proxy server for a local network that authenticates with Active Directory and gives me access The control list enables you to configure the domain groups within AD. I am using: Static with Squid 2.7: Windows 2008 Server R2 I have followed this guide here: The proxy does not currently ask for any Active Directory accounts, as soon as I add the following lines, it starts denying this connection: ACL localnet proxy_auth Required src 192.168. 0.0 / 24 http_access permission localname This is my squid.conf: pastebin.com/ERuKtirc I see logs and 'none' or 'direct' L It comes together TCP_DENIED message 1415014073.069 1 192.168.0.63 TCP_DENIED / 407/1904 Received / -. None / - Text / html 1415014073.07 9 4 192.168.0.63 TCP_DENIED / 407 2304 Received / - None / - Text / html 1415014073.084 2 192.168.0.63 TCPDAD / 407 1904 Received / - None - - Text / html itemprop = "text"> This proxy returns a 407 request with a browse...
Read more

java - Can't add JTree to JPanel of a JInternalFrame -

-
Image
There are two panels in my JInternalframe. I want to add TopPanel to Jtree to nominate another. But I can not add Jaitari to the top of the panel. Please help me in this piece of code: DefaultMutableTreeNode root = new DefaultMutableTreeNode ("deck"); DefaultMutableTreeNode Item Clubs = New DefaultMutableTreeNode ("Club"); AddAllCard (itemClubs); Root.add (itemClubs); DefaultMutableTreeNode item = New DefaultMutableTreeNode ("Diamonds"); AddAllCard (itemDiamonds); Root.add (itemDiamonds); DefaultMutableTreeNode Itemspads = New DefaultMutableTreeNode ("Spades"); AddAllCard (itemSpades); Root.add (itemSpades); DefaultMutableTreeNode item increases = new DefaultMutableTreeNode ("heart"); AddAllCard (itemHearts); Root.add (itemHearts); Default Trimodel Tree Model = New DefaultTreeModel (Route); Tree = new jetty (tree modal); ScrollPane = new JScrollPane (tree); // scrollPane.setViewportView (tree); . ScrollPane.getViewport () add (tr...
Read more

python - Calculate STD manually using Groupby Pandas DataFrame -

-
Image
I was trying to write a solution, which is a different and a manual for calculating a mean and STD The way. I have created a = ["Apple", "Banana", "Cherry", "Apple"] B = [3,4,7,3] C = [5,4,1,4] D = [7,8,3,7] Pd DF = PD to import pandals DataFrame (index = class (4), column = list ("ABCD")) DF ["A"] = A DF ["B"] = BDF ["C"] = C DF ["D"] = D Again, I made a list of A duplication. Then I went through the group all the time of the objects and calculated the solution. import as np l = list (set (df.A)) df.groupby ('A', As_index = False) listMean = [0] * len (df.C) ListSTD = [0] * L in the LAN (df.C) X: s = np.mean (df [df ['A'] == x] for C =.) = Z = [index for index, enumerate In the object (df ['a']. Value] x == item i for z: listMean [i] = s in: s = np.std (df [df ['a'] == X] .cvalues) z = index for index, enumerate item (df ['a']. Value) if x ==...
Read more