Def search_syslog_new (self, syslog_re, timeout=150, search_res={}, begin_line=0) :
Start_time=time. Time ()
While True:
Adb_cmd="{0} the adb - s shell tail - F - n 10 syslog. Log | grep - line - buffered 'signal=trans, message='". The format (device_name)
Return_code=Popen (adb_cmd, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
Log_lines=return_code. Stdout. Readlines (10)
Print (' log_content_is log_lines)
For the line in the range (begin_line, len (log_lines) :
If re.com running (syslog_re). The search (log_lines [the line]. Decode (' utf-8)) is not None:
# the callback function processing
# print (' log_content_is, log_lines [the line]. Decode (' utf-8))
If (search_res) :
Search_res [' search_groups]=re.com running (syslog_re). The search (log_lines [the line]. Decode (' utf-8 ')). The groups ()
Print (search_res [' search_groups'])
Print (re.com running (syslog_re). The search (log_lines [the line]. Decode (' utf-8)))
# return True
# time. Sleep (0.1)
If (time. Time () & gt; Start_time + float (timeout)) :
Print (" search syslog for {} seconds, the timeout ". The format (timeout))
Break
Return False

Syslog. The log content is continuously added, by performing the above method with content print (' log_content_is' log_lines) returns the results sometimes lack a part lines
But synchronization on the command line directly execute tail - F - n 10 syslog. Log | grep - line - buffered 'signal=trans, message=' corresponding results are complete, no missing