def path(sheet):
""" Returns a sheet's filesystem path """
return sheets.get()[sheet]
def exists_in_default_path(sheet):
""" Predicate that returns true if the sheet exists in default_path"""
default_path_sheet = os.path.join(sheets.default_path(), sheet)
return sheet in sheets.get() and os.access(default_path_sheet, os.R_OK)
def is_writable(sheet):
""" Predicate that returns true if the sheet is writeable """
return sheet in sheets.get() and os.access(path(sheet), os.W_OK)
def exists(sheet):
""" Predicate that returns true if the sheet exists """
return sheet in sheets.get() and os.access(path(sheet), os.R_OK)
