Module Sys

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The Blender.sys submodule.

sys

This module provides a minimal set of helper functions and data. Its purpose is to avoid the need for the standard Python module 'os', in special 'os.path', though it is only meant for the simplest cases.

Example:

 import Blender

 filename = ""
 def f(name): # file selector callback
   global filename
   filename = name

 Blender.Window.FileSelector(f)

 if filename:
   print 'basename:', Blender.sys.basename(filename)
   print 'dirname:',  Blender.sys.dirname(filename)
   print 'splitext:', Blender.sys.splitext(filename)

 # what would basename(splitext(filename)[0]) print?

Attention: The module is called sys, not Sys.

Functions

string

basename(path)
Get the base name (filename stripped from dir info) of 'path'.

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string

dirname(path)
Get the dir name (dir path stripped from filename) of 'path'.

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string

join(dir, file)
Join the given dir and file paths, using the proper separator for each platform.

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tuple of two strings

splitext(path)
Split 'path' into (root, ext), where 'ext' is a file extension including the full stop.

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string

makename(path='Blender.Get(\'filename\')', ext='', strip=0)
Remove extension from 'path', append extension 'ext' (if given) to the result and return it. source code

int

exists(path)
Tell if the given pathname (file or dir) exists.

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float

time()
Get the current time in seconds since a fixed value.

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sleep(millisecs=10)
Sleep for the specified amount of time.

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string

expandpath(path)
Expand the given Blender 'path' into an absolute and valid path.

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string

cleanpath(path)
Clean the given 'path' by removing unneeded components such as "/./" and "/test/../"

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Variables
char	dirsep same as sep.
string	progname the Blender executable (argv[0]).
char	sep the platform-specific dir separator for this Blender: '/' everywhere, except on Win systems, that use '\'.

Function Details

basename(path)

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Get the base name (filename stripped from dir info) of 'path'.

Parameters:

path (string) - a path name

Returns: string

the base name

dirname(path)

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Get the dir name (dir path stripped from filename) of 'path'.

Parameters:

path (string) - a path name

Returns: string

the dir name

join(dir, file)

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Join the given dir and file paths, using the proper separator for each platform.

Parameters:

dir (string) - the dir name, like returned from dirname.
file (string) - the bare filename, like returned from basename.

Returns: string

the resulting filename.

Warning: this simple function isn't intended to be a complete replacement for the standard os.path.join() one, which handles more general cases.

splitext(path)

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Split 'path' into (root, ext), where 'ext' is a file extension including the full stop.

Example:

 import Blender
 file, ext= Blender.sys.splitext('/tmp/foobar.blend')
 print file, ext
 # ('/tmp/foobar', '.blend')

Parameters:

path (string) - a path name

Returns: tuple of two strings

(root, ext)

Note: This function will raise an error if the path is longer then 80 characters.

makename(path=`'Blender.Get(\'filename\')'`, ext=`''`, strip=0)

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Remove extension from 'path', append extension 'ext' (if given) to the result and return it. If 'strip' is non-zero, also remove dirname from path.

Example:

 import Blender
 from Blender.sys import *
 print makename('/path/to/myfile.txt','.abc', 1) # returns 'myfile.abc'

 print makename('/path/to/myfile.obj', '-01.obj') # '/path/to/myfile-01.obj'

 print makename('/path/to/myfile.txt', strip = 1) # 'myfile'

 # note that:
 print makename(ext = '.txt')
 # is equivalent to:
 print sys.splitext(Blender.Get('filename'))[0]) + '.txt'

Parameters:

path (string) - a path name or Blender.Get('filename'), if not given.
ext (string) - an extension to append. For flexibility, a dot ('.') is not automatically included.

Returns: string

the resulting string

exists(path)

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Tell if the given pathname (file or dir) exists.

Returns: int

0: path does not exist;
1: path is an existing filename;
2: path is an existing dirname;
-1: path exists but is neither a regular file nor a dir.

time()

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Get the current time in seconds since a fixed value. Successive calls to this function are guaranteed to return values greater than the previous call.

Returns: float: the elapsed time in seconds.

sleep(millisecs=10)

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Sleep for the specified amount of time.

Parameters:

millisecs (int) - the amount of time in milliseconds to sleep. The default is 10 which is 0.1 seconds.

expandpath(path)

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Expand the given Blender 'path' into an absolute and valid path. Internally, Blender recognizes two special character sequences in paths:

'//' (used at the beginning): means base path -- the current .blend file's dir;
'#' characters in the filename will be replaced by the frame number.

The expanded string can be passed to generic python functions that don't understand Blender's internal relative paths.

Parameters:

path (string) - a path name.

Returns: string

the expanded (if necessary) path.

Notes:

this function is also useful for obtaining the name of the image that will be saved when rendered.
if the passed string doesn't contain the special characters it is returned unchanged.

cleanpath(path)

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Clean the given 'path' by removing unneeded components such as "/./" and "/test/../"

Parameters:

path (string) - a path name.

Returns: string

the cleaned (if necessary) path.

Module Sys

sys

basename(path)

dirname(path)

join(dir, file)

splitext(path)

makename(path='Blender.Get(\'filename\')', ext='', strip=0)

exists(path)

time()

sleep(millisecs=10)

expandpath(path)

cleanpath(path)

makename(path=`'Blender.Get(\'filename\')'`, ext=`''`, strip=0)