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...output from the last run of Cog (if any). For each chunk of generator code it finds, Cog will: discard the output from the last run, execute the generator code, capture the output, from the cog.outl calls, and insert the output back into the output section. How It Worked Out In a word, great. We now have a powerful tool that lets us maintain a single XML file that describes our data schema. Developers changing the schema have a simple tool to run that generates code from the schema, prod...
...output implementation of universal newlines, Python programs are expected to handle this by themselves or write files with platform-local convention otherwise. The reason for this is that input is the difficult case, outputting different newlines to a file is already easy enough in Python. Also, an output implementation would be much more difficult than an input implementation, surprisingly: a lot of output is done through PyXXX_Print() methods, and at this point the file object is not availabl...
...output destinations: A single file on disk or a stream (implemented as docutils.io.FileOutput). A tree of directories and files on disk. A Python string, returned to a client application (implemented as docutils.io.StringOutput). No output; useful for programmatic applications where only a portion of the normal output is to be used (implemented as docutils.io.NullOutput). A single tree-shaped data structure in memory. Some other set of data structures in memory. Docutils Package Structure ...
...output, a combination of sys.stdout.write(), and string interpolation can be used. The print statement by definition outputs to sys.stdout. More specifically, sys.stdout must be a file-like object with a write() method, but it can be rebound to redirect output to files other than specifically standard output. A typical idiom is: save_stdout = sys.stdout try: sys.stdout = mylogfile print 'this message goes to my log file' finally: sys.stdout = save_stdout The problem with this app...
...output to stdout or stderr is impractical: Daemon applications where the framework doesn't allow the redirection of standard output to some file, but assumes use of some other form of logging. Examples are syslog under *nix'es and EventLog under WinNT+. GUI applications which want to output every new log entry in separate pop-up window (i.e. fading OSD). Also sometimes applications want to filter output entries based on their source or severity. This requirement can't be implemented using si...
...output type(s). Default converters must have quoted names, custom converters must have regular names. A Python type is given by its name. If a function accepts multiple Python types, the set is written in list form. Since the default converters may have multiple implicit return values, the C output type(s) are written according to the following convention: The main return value must be named res. This is a placeholder for the actual variable name given later in the DSL. Additional implicit ret...
...output. However, the output function cannot be all things to all people, and the current output function too often falls short of this goal. This PEP describes a way to provides alternatives to the built-in display function in Python, so users will have control over the output from the interactive interpreter. Interface The current Python solution has worked for many users, and this should not break it. Therefore, in the default configuration, nothing will change in the REPL loop. To change ...
...Output Argument Clinic writes its output inline in the C file, immediately after the section of Clinic code. For "python" sections, the output is everything printed using builtins.print. For "clinic" sections, the output is valid C code, including: a #define providing the correct methoddef structure for the function a prototype for the "impl" function -- this is what you'll write to implement this function a function that handles all argument processing, which calls your "impl" function the d...
...output of the Parser and Reader, and the input to the Writer all share the same data structure. Transforms, which modify the document tree. Writers for output formats. Distributors, which handle output management (one file, many files, or objects in memory). These issues are applicable to any docstring processing system implementation. PEP 258 documents these issues. Docstring processing system implementation. Input markup specifications: docstring syntax. PEP 287 proposes a standard syntax...
...output) and to obtain information from the user (interactive input). Any computer language intended to be used in an educational setting should provide straightforward methods for both output and interactive input. The current proposals for Python 3.0 include a simple output pathway via a built-in function named print(), but a more complicated method for input [e.g. via sys.stdin.readline()], one that requires importing an external module. Current versions of Python (pre-3.0) include raw_input(...
...Output Formats Not all input formats need to be supported as output formats, because it's pretty trivial to get the strftime() argument right for simple things such as YYYY/MM/DD. Only complicated formats need to be supported; RFC 2822 is currently the only one I can think of. Options: Provide predefined format strings, so you could write this: import datetime d = datetime.datetime(...) print d.strftime(d.RFC2822_FORMAT) # or datetime.RFC2822_FORMAT? Provide new methods on all the objects:...
...Output is then copied to *buffer. If *buffer is NULL, a buffer of the needed size is allocated and output copied into it. *buffer is then updated to point to the allocated memory area. The caller is responsible for calling PyMem_Free() to free the allocated *buffer after usage. In both cases *buffer_len is updated to the number of characters written (excluding the trailing NULL-byte). The output buffer is assured to be NULL-terminated. Examples: Using "es#" with auto-allocation: static PyOb...
...output. Both Loggers and Handlers may use logging levels and (optionally) Filters to decide if they are interested in a particular LogRecord. When it is necessary to output a LogRecord externally, a Handler can (optionally) use a Formatter to localize and format the message before sending it to an I/O stream. Each Logger keeps track of a set of output Handlers. By default all Loggers also send their output to all Handlers of their ancestor Loggers. Loggers may, however, also be configured to...
...output size will set this variable to None. Hashing objects require a single attribute: digest_size This attribute is identical to the module-level digest_size variable, measuring the size of the digest produced by the hashing object, measured in bytes. If the hash has a variable output size, this output size must be chosen when the hashing object is created, and this attribute must contain the selected size. Therefore, None is not a legal value for this attribute. Hashing objects require t...
...output with error output, up until the last possible moment. For example, the application may need to change the response status from "200 OK" to "500 Internal Error", if an error occurs while the body is being generated within an application buffer. The exc_info argument, if supplied, must be a Python sys.exc_info() tuple. This argument should be supplied by the application only if start_response is being called by an error handler. If exc_info is supplied, and no HTTP headers have been outp...
...output '0o' in front of the octal digits (for 3.0, and 2.6 compatibility mode). Output formatting In 3.0, the string % operator alternate syntax for the 'o' option will need to be updated to add '0o' in front, instead of '0'. In 2.6, alternate octal formatting will continue to add only '0'. In neither 2.6 nor 3.0 will the % operator support binary output. This is because binary output is already supported by PEP 3101 (str.format), which is the preferred string formatting method. Transitio...
...Output Example 2: Database Queries Example 2 Output Copyright Rejection Notice This PEP was rejected. See https://mail.python.org/pipermail/python-dev/2012-March/117510.html Abstract This PEP proposes an extension to permit objects to define their own meanings for the boolean operators 'and', 'or' and 'not', and suggests an efficient strategy for implementation. A prototype of this implementation is available for download. Background Python does not currently provide any '__xxx__' spec...
...output formats. Bill Janssen suggested something else What output formats are needed HTML PDF Subject matter: Python core Extension modules Applications Applets THE PSA as a Catalyst Authors of software would have an incentive to write documentation according to a common standard if that were a prerequisite for receiving the PSA stamp-of-approval. For this to work the PSA will need guidelines to use for the eval...
...Outputs the number in base 2. 'c' - Character. Converts the integer to the corresponding Unicode character before printing. 'd' - Decimal Integer. Outputs the number in base 10. 'o' - Octal format. Outputs the number in base 8. 'x' - Hex format. Outputs the number in base 16, using lower- case letters for the digits above 9. 'X' - Hex format. Outputs the number in base 16, using upper- case letters for the digits above 9. 'n' - Number. This is the same as 'd', except that it us...