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  2. Standard streams - Wikipedia

    en.wikipedia.org/wiki/Standard_streams

    Others (such as many Unix media players) may read files from standard input. Popular Windows programs that open a separate console window in addition to their GUI windows are the emulators pSX and DOSBox. GTK-server can use stdin as a communication interface with an interpreted program to realize a GUI.

  3. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  4. File descriptor - Wikipedia

    en.wikipedia.org/wiki/File_descriptor

    File descriptors for a single process, file table and inode table. Note that multiple file descriptors can refer to the same file table entry (e.g., as a result of the dup system call [3]: 104 ) and that multiple file table entries can in turn refer to the same inode (if it has been opened multiple times; the table is still simplified because it represents inodes by file names, even though an ...

  5. Pipeline (Unix) - Wikipedia

    en.wikipedia.org/wiki/Pipeline_(Unix)

    Alternatively, if the drain does not need to read any input from stdin to do something useful, it can be given < /dev/null as input. As all components of a pipe are run in parallel, a shell typically forks a subprocess (a subshell) to handle its contents, making it impossible to propagate variable changes to the outside shell environment.

  6. reStructuredText - Wikipedia

    en.wikipedia.org/wiki/ReStructuredText

    reStructuredText (RST, ReST, or reST) is a file format for textual data used primarily in the Python programming language community for technical documentation.. It is part of the Docutils project of the Python Doc-SIG (Documentation Special Interest Group), aimed at creating a set of tools for Python similar to Javadoc for Java or Plain Old Documentation (POD) for Perl.

  7. read (system call) - Wikipedia

    en.wikipedia.org/wiki/Read_(system_call)

    In modern POSIX compliant operating systems, a program that needs to access data from a file stored in a file system uses the read system call. The file is identified by a file descriptor that is normally obtained from a previous call to open .

  8. cat (Unix) - Wikipedia

    en.wikipedia.org/wiki/Cat_(Unix)

    This is because the redirection form opens the file as the stdin file descriptor which command can fully access, while the cat form simply provides the data as a stream of bytes. Another common case where cat is unnecessary is where a command defaults to operating on stdin, but will read from a file, if the filename is given as an argument ...

  9. Python - Wikipedia

    en.wikipedia.org/wiki/Python

    Python (codename), a British nuclear war contingency plan; Python, a 2000 horror film by Richard Clabaugh; Monty Python or the Pythons, a British comedy group Python (Monty) Pictures, a company owned by the troupe's surviving members; Python, a work written by philosopher Timon of Phlius