def detect_timestamp_format(timestamp):
time_formats = {<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>'),<EOL>'<STR_LIT>': re.compile(r'<STR_LIT>')<EOL>}<EOL>for time_format in time_formats:<EOL><INDENT>if re.match(time_formats[time_format], timestamp):<EOL><INDENT>return time_format<EOL><DEDENT><DEDENT>return '<STR_LIT>'<EOL>
Given an input timestamp string, determine what format is it likely in.

:param string timestamp: the timestamp string for which we need to determine format
:return: best guess timestamp format