def valid_gsl_dir(val):
"""
Validate given string to be path containing required GSL files.
"""
if val is None:
return True
if not isinstance(val, str):
raise PreferenceError(f'Illegal value for GSL directory: {str(val)}, has to be str')
if not os.path.isdir(val):
raise PreferenceError(f'Illegal value for GSL directory: {val}, has to be existing directory')
if any(not os.path.isfile(os.path.join(val, 'gsl', filename))
for filename in ['gsl_odeiv2.h', 'gsl_errno.h', 'gsl_matrix.h']):
raise PreferenceError(f"Illegal value for GSL directory: '{val}', "
f"has to contain gsl_odeiv2.h, gsl_errno.h "
f"and gsl_matrix.h")
return True
def valid_gsl_dir(val):
'''
Validate given string to be path containing required GSL files.
'''
if val is None:
return True
if not isinstance(val, basestring):
raise PreferenceError(('Illegal value for GSL directory: %s, '
'has to be str' % (str(val))))
if not os.path.isdir(val):
raise PreferenceError(('Illegal value for GSL directory: %s, '
'has to be existing directory' % (val)))
if any(not os.path.isfile(os.path.join(val, 'gsl', filename))
for filename in ['gsl_odeiv2.h', 'gsl_errno.h', 'gsl_matrix.h']):
raise PreferenceError(('Illegal value for GSL directory: %s, '
'has to contain gsl_odeiv2.h, gsl_errno.h '
'and gsl_matrix.h' % (val)))
return True