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In particular, you can learn how to use TLS and authentication by supplying more arguments to the ServerProxy class But one feature is important enough to go ahead and cover here: the ability to make several calls in a network round-trip when the server supports it (it is another one of those optional extensions), as shown in Listing 18 4 Listing 18 4 Using XML-RPC Multicall #!/usr/bin/env python # Foundations of Python Network Programming - 18 - xmlrpc_multicallpy # XML-RPC client performing a multicall import xmlrpclib proxy = xmlrpclibServerProxy('http://127001:7001') multicall = xmlrpclibMultiCall(proxy) multicalladdtogether('a', 'b', 'c') multicallquadratic(2, -4, 0) multicallremote_repr([1, 20, 'three']) for answer in multicall(): print answer.

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The configuration for the default implementation is: <barcode> < upc-a > <height>{ length:15mm}</height> <module-width>{length:0.33mm}</module-width> ...

I will cover attributes in 21, but it s worth mentioning the Flags attribute here. The attribute does not change the calculations at all. It does, however, provide several convenient features. First, it informs object browsers looking at the code that the members of the enum are meant to be combined as bit flags, rather than only used as separate values. This allows the browsers to interpret variables of the enum type more appropriately. Second, it allows the ToString method of an enum to provide more appropriate formatting for the values of bit flags. The ToString method takes an enum value and compares it to the values of the constant members of the enum. If it matches one of the members, ToString returns the string name of the member.

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UPC-A is also known as Universal Product Code version A, UPC-A Supplement 5/Five-digit Add-On, UPC-A Supplement 2/Two-digit Add-On, UPC-A +5, ...

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When you run this script, you can carefully watch the server s command window to confirm that only a single HTTP request is made in order to answer all three function calls that get made: localhost - - [04/Oct/2010 00:16:19] "POST /RPC2 HTTP/1.0" 200 The ability to log messages like the preceding one can be turned off, by the way; such logging is controlled by one of the options in SimpleXMLRPCServer. Note that the default URL used by both the server and client is the path /RPC2, unless you consult the documentation and configure the client and server differently. Three final points are worth mentioning before we move on to examining another RPC mechanism: There are two additional data types that sometimes prove hard to live without, so many XML-RPC mechanisms support them: dates and the value that Python calls None (other languages call this null or nil instead). Python s client and server both support options that will enable the transmission and reception of these nonstandard types. Keyword arguments are, alas, not supported by XML-RPC, because few languages are sophisticated enough to include them and XML-RPC wants to interoperate with those languages. Some services get around this by allowing a dictionary to be passed as a function s final argument or by disposing of positional arguments altogether and using a single dictionary argument for every function that supplies all of its parameters by name. Finally, keep in mind that dictionaries can only be passed if all of their keys are strings, whether normal or Unicode. See the Self-documenting Data section later in this chapter for more information on how to think about this restriction.

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racca3141/UPC: Build a UPC-A label. - GitHub
27 Apr 2018 ... UPCMain . java is a command line program that takes in a 12 digit number and checks to see if it is a valid UPC-A barcode. It does this by ...

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Suppose, for example, that you have used the enum declaration for CardDeckSettings (given in the preceding code), and have not used the Flags attribute. The first line of the following code creates a variable (named ops) of the enum type, and sets the value of a single flag bit. The second line uses ToString to get the string name of the member represented by that value. CardDeckSettings ops = CardDeckSettings.SingleDeck; Console.WriteLine( ops.ToString() ); This code produces the following output: // Set the bit flag. // Print its name.

While the entire point of an RPC protocol like XML-RPC is to let you forget about the details of network transmission and focus on normal programming, you should see what your calls will look like on the wire at least once! Here is the first call to quadratic() that our sample client program makes: < xml version='1.0' > <methodCall> <methodName>quadratic</methodName> <params> <param> <value><int>2</int></value> </param> <param> <value><int>-4</int></value> </param> <param> <value><int>0</int></value> </param> </params> </methodCall> The response to the preceding call looks like this: < xml version='1.0' > <methodResponse> <params> <param> <value><array><data> <value><double>0.0</double></value>

A page containing a list of your API keys will be displayed. Select an API key from the list on the right; for example, Figure 4-20 shows the Flickr key you entered in the Flickr block. You can edit the API Key in the text box. Click Update to store the text box contents. Click Remove to delete the API key. Remember, updating or removing the API key will affect any block with the key stored in it.

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BE THE CODER > Barcodes > Barcode4j Examples > Barcode UPC-A
Barcode4J is a free and flexible Java library for Barcode generation. This requires the ... in classpath. The following example shows generating UPC-A Barcode.

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UPC-A Java Barcode Generator/Class Library - TarCode.com
UPC-A barcode generator can print UPC-A and saved it as GIF and JPEG images using Java class library. Generated UPC-A barcode images can be displayed ...

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