OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.
os.sysconf() method in Python is used to get integer-valued system configuration values. It accepts a string parameter name which specifies which configuration value is to retrieve.
All possible values for name parameter is given as the keys of sysconf_names dictionary. We can also pass an integer value for name parameter for those configuration variables which is not included in the dictionary.
If the configuration variables specified by the name parameter is not defined by the system, then os.sysconf() method will return None and if the name does not specify any existing configuration variables then ValueError exception is raised. Also, if configuration value is not supported by the host operating system, OSError exception is raised.
Note: os.sysconf() method is available only on UNIX platforms.
Syntax: os.sysconf(name)
Parameter:
name: A string or an integer value representing a system configuration variable.
Return Type: This method returns an integer value which represents the configuration value corresponding to the specified configuration variable.
Code: Use of os.sysconf() method
Python3
# Python program to explain os.sysconf() method # importing os module import os # System Configuration variable name = "SC_PAGE_SIZE" # Get the integer-valued # configuration value corresponding # to the specified configuration # variable using os.sysconf() method value = os.sysconf(name) # Print the configuration value print("% s :" % name, value) # System Configuration variable name1 = "SC_INT_MIN"name2 = "SC_INT_MAX" # Get the integer-valued # configuration value corresponding # to the specified configuration # variable using os.sysconf() method value1 = os.sysconf(name1) value2 = os.sysconf(name2) # Print the configuration value print("% s :" % name1, value1) print("% s :" % name2, value2) # We can also pass an integer # value for name parameter. # integer value must be present in # os.sysconf_names dictionary as value # of any configuration variable # for example conf_var = "SC_INT_MIN"name = os.sysconf_names[conf_var] print("\nInteger value corresponding to % s:" % conf_var, name) # Get the integer-valued # configuration value corresponding # to the specified integer value # using os.sysconf() method value = os.sysconf(name) # Print the configuration value print("Configuration value corresponding to % s :" % name, value) # Note: -1 is returned if the # configuration variable is not defined # by the system |
SC_PAGE_SIZE : 4096 SC_INT_MIN : -2147483648 SC_INT_MAX : 2147483647 Integer value corresponding to SC_INT_MIN: 105 Configuration value corresponding to 105 : -2147483648
Code #2: Possible errors while using os.sysconf() method
Python3
# Python program to explain os.sysconf() method # importing os module import os # System Configuration variable name = "PAGE_SIZE" # If the specified name # is not a configuration variable # then ValueError Exception # is raised value = os.sysconf(name) print("% s:" % name, value) # Similarly, if the a specific # value for name parameter is # not supported by host operating system # then OSError exception # is raised. |
Traceback (most recent call last):
File "sysconf.py", line 15, in
value = os.sysconf(name)
ValueError: unrecognized configuration name
Code #3: Handling possible errors while using os.sysconf() method
Python3
# Python program to explain os.sysconf() method # importing os module import os # System Configuration variable name = "PAGE_SIZE" # we can handle exception # using try and except block # Try getting the system # configuration value corresponding # to specified configuration variable try : value = os.sysconf(name) print("% s:" % name, value) # If the specified name is # not a configuration variable except ValueError : print("'% s' is not a configuration variable" % name) # If the specified name is # not supported by the # operating system except OSError : print("'% s' is not supported by Operating system" % name) |
'PAGE_SIZE' is not a configuration variable
