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GeezerVison is showing github.com — python-control/control/exception.py at main · python-control/python-control

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# exception.py - exception definitions for the control package
#
# Initial author: Richard M. Murray
# Creation date: 31 May 2010
"""Exception definitions for the control package."""
class ControlSlycot(ImportError):
"""Slycot import failed."""
pass
class ControlDimension(ValueError):
"""Raised when dimensions of system objects are not correct."""
pass
class ControlArgument(TypeError):
"""Raised when arguments to a function are not correct."""
pass
class ControlIndexError(IndexError):
"""Raised when arguments to an indexed object are not correct."""
pass
class ControlMIMONotImplemented(NotImplementedError):
"""Function is not currently implemented for MIMO systems."""
pass
class ControlNotImplemented(NotImplementedError):
"""Functionality is not yet implemented."""
pass
# Utility function to see if Slycot is installed
slycot_installed = None
def slycot_check():
"""Return True if Slycot is installed, otherwise False."""
global slycot_installed
if slycot_installed is None:
try:
import slycot # noqa: F401
slycot_installed = True
except:
slycot_installed = False
return slycot_installed
# Utility function to see if pandas is installed
pandas_installed = None
def pandas_check():
"""Return True if pandas is installed, otherwise False."""
global pandas_installed
if pandas_installed is None:
try:
import pandas # noqa: F401
pandas_installed = True
except:
pandas_installed = False
return pandas_installed
# Utility function to see if cvxopt is installed
cvxopt_installed = None
def cvxopt_check():
"""Return True if cvxopt is installed, otherwise False."""
global cvxopt_installed
if cvxopt_installed is None:
try:
import cvxopt # noqa: F401
cvxopt_installed = True
except:
cvxopt_installed = False
return cvxopt_installed
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