283 def _open(filepath, mode, _open_func=open):  argument
331   def create_file(self, file_path=None, content=None, mode='w', encoding='utf8',  argument
399   def _create(cls, base_path, file_path, content, mode, encoding, errors):  argument
458   def write_text(self, text, mode='w', encoding='utf8', errors='strict'):  argument
473   def write_bytes(self, data, mode='wb'):  argument
485   def open_text(self, mode='rt', encoding='utf8', errors='strict'):  argument
509   def open_bytes(self, mode='rb'):  argument
672   def create_tempfile(self, file_path=None, content=None, mode='w',  argument
1233   def assertCommandSucceeds(self, command, regexes=(b'',), env=None,  argument
1279   def assertCommandFails(self, command, regexes, env=None, close_fds=True,  argument
1955 def get_command_string(command):  argument
1977 def get_command_stderr(command, env=None, close_fds=True):  argument