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ON ERROR GOTO handler OPEN "Somefile.txt" FOR INPUT AS # 1 CLOSE # 1 PRINT "File opened successfully" END handler: PRINT "File does not exist" END ' RESUME may be used instead which returns control to original position.
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})
Parse tree of Python code with inset tokenization. The syntax of textual programming languages is usually defined using a combination of regular expressions (for lexical structure) and Backus–Naur form (a metalanguage for grammatical structure) to inductively specify syntactic categories (nonterminal) and terminal symbols. [7]
In an interactive log-file browser, the right thing to do might be to return the entry unparsed, so the user can see it—but in an automated log-summarizing program, the right thing to do might be to supply null values for the unreadable fields, but abort with an error, if too many entries have been malformed.
Most email software and applications have an account settings menu where you'll need to update the IMAP or POP3 settings. When entering your account info, make sure you use your full email address, including @aol.com, and that the SSL encryption is enabled for incoming and outgoing mail.
This computer-programming -related article is a stub. You can help Wikipedia by expanding it.
The company's share price fell from $3.22 to $1.15 last week after the Wall Street Journal reported it was preparing to file for bankruptcy protection, closing on $1.07 on Friday.