pexpect fails to match command if greater than 65 characters

Issue with pexpect, python module.

Pexpect fails to do expected behavior if the length of the command is greater than 65.

#!/usr/bin/pythonimport pexpectsshCmd='ssh root@15.186.22.105'prompt='[root@user ~]#'ConnectToClient=pexpect.spawn(sshCmd)ConnectToClient.expect('password')ConnectToClient.send('abcd')ConnectToClient.expect(prompt)ConnectToClient.send('echo abcdefghijklmnopqrst111111111111111111111111111111111111111111111111111111111 ')ConnectToClient.expect(prompt) ---> PASScommand = 'echo abcdefghijklmnopqrst111111111111111111111111111111111111111111111111111111111'ConnectToClient.expect(command, prompt) 

While expecting ":", the command (.*) prompt --->FAILS if the length of command is greater than 65.

expect_str = "%s(.*)%s" % (command, self._default_prompt)