commands in Visual Studio .NET

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The commands module is used to execute simple system commands specified as a string and return their output as a string It only works on UNIX systemsThe functionality provided by this module is somewhat similar to using backquotes (`) in a UNIX shell script For example, typing x = commandsgetoutput('ls l') is similar to saying x=`ls l`
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getoutput(cmd)
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Executes cmd in a shell and returns a string containing both the standard output and standard error streams of the command
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19 Operating System Services
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getstatusoutput(cmd)
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Like getoutput(), except that a 2-tuple (status, output) is returned, where status is the exit code, as returned by the oswait() function, and output is the string returned by getoutput()
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Notes
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This module is only available in Python 2 In Python 3, both of the previous functions are found in the subprocess module Although this module can be used for simple shell operations, you are almost always better off using the subprocess module for launching subprocesses and collecting their output
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See Also:
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subprocess (p 402)
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ConfigParser, configparser
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The ConfigParser module (called configparser in Python 3) is used to read ini format configuration files based on the Windows INI formatThese files consist of named sections, each with its own variable assignments such as the following:
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# A comment ; A comment [section1] name1 = value1 name2 = value2 [section2] ; Alternative syntax for assigning values name1: value1 name2: value2
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The ConfigParser Class
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The following class is used to manage configuration variables:
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ConfigParser([defaults [, dict_type]])
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Creates a new ConfigParser instance defaults is an optional dictionary of values that can be referenced in configuration variables by including string format specifiers such as '%(key)s where key is a key of defaults dict_type specifies the type of dictionary that is used internally for storing configuration variables By default, it is dict (the built-in dictionary) An instance c of ConfigParser has the following operations:
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cadd_section(section)
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Adds a new section to the stored configuration parameters section is a string with the section name
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ConfigParser, configparser
cdefaults()
Returns the dictionary of default values
cget(section, option [, raw [, vars]])
Returns the value of option option from section section as a string By default, the returned string is processed through an interpolation step where format strings such as '%(option)s' are expanded In this case, option may the name of another configuration option in the same section or one of the default values supplied in the defaults parameter to ConfigParser raw is a Boolean flag that disables this interpolation feature, returning the option unmodified vars is an optional dictionary containing more values for use in '%' expansions
cgetboolean(section, option)
Returns the value of option from section section converted to Boolean valueValues such as "0", "true", "yes", "no", "on", and "off" are all understood and checked in a case-insensitive mannerVariable interpolation is always performed by this method (see cget())
cgetfloat(section, option)
Returns the value of option from section section converted to a float with variable interpolation
cgetint(section, option)
Returns the value of option from section section converted to an integer with variable interpolation
chas_option(section, option)
Returns True if section section has an option named option
chas_section(section)
Returns True if there is a section named section
citems(section [, raw [, vars]])
Returns a list of (option, value) pairs from section section raw is a Boolean flag that disables the interpolation feature if set to True vars is a dictionary of additional values that can be used in '% expansions
coptions(section)
Returns a list of all options in section section
coptionxform(option)
Transforms the option name option to the string that s used to refer to the option By default, this is a lowercase conversion
cread(filenames)
Reads configuration options from a list of filenames and stores them filenames is either a single string, in which case that is the filename that is read, or a list of filenames If any of the given filenames can t be found, they are ignoredThis is useful if you want to read configuration files from many possible locations, but where such files may or may not be defined A list of the successfully parsed filenames is returned
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19 Operating System Services
creadfp(fp [, filename])
Reads configuration options from a file-like object that has already been opened in fp filename specifies the filename associated with fp (if any) By default, the filename is taken from fpname or is set to '< >' if no such attribute is defined
cremove_option(section, option)