Python uses a progress bar

Added some modifications to the progress bar found in the pyskydrive Project (http://code.google.com/p/pyskydrive!

Import OS <br/> Import sys <br/> Import CMD <br/> Import unicodedata <br/> from threading import thread <br/> from time import sleep </P> <p> class progressbar (thread): <br/> "a simple text progress bar control. "</P> <p> def _ init _ (Self): <br/> self. running = true <br/> self. percent =-1 <br/> self. MSG = "" <br/> thread. _ init _ (Self) </P> <p> def run (Self): <br/> I = 1 <br/> while self. running and self. Percent <100: <br/> display = '/R' </P> <p> If self. MSG! = "": <Br/> display + = self. MSG + ''</P> <p> If self. percent> = 0: <br/> display + = STR (self. percent) + '%' <br/> display + = '-' * (40 * self. (percent/100) </P> <p> If I + 1 + Len (Display)> 80: <br/> I = 1 </P> <p> display + = '-' * I <br/> display + = '>' <br/> display + =' '* (80-len (Display )) <br/> sys. stderr. write (Display) </P> <p> I + = 1 <br/> sleep (0.5) </P> <p> sys. stderr. write ('/R' + ''* 79 + '/R') <br/> sys. stderr. flush () </P> <p> def stop (Self): <br/> "" Stop displaying progress bar. </P> <p> Note: There may be latency to stop. you 'd better wait for the thread <br/> stops. see _ stop_progress (t_BAR ). </P> <p> "" <br/> self. running = false </P> <p> def set_percent (self, percent, MSG = ""): <br/> "" Call Back Method for owner of progress bar. "<br/> self. percent = int (percent) <br/> self. ms G = MSG </P> <p> def is_alive (Self): <br/> return self. isalive () </P> <p> def _ start_progress (): <br/> "" display a progress bar "" <br/> t_BAR = progressbar () <br/> t_bar.start () <br/> return t_BAR </P> <p> def _ stop_progress (t_BAR ): <br/> "hide the progress bar" <br/> If hasattr (t_BAR, "is_alive"): <br/> alive = t_bar.is_alive () <br/> else: <br/> alive = t_bar.isalive () </P> <p> If t_BAR and alive: <B R/> t_bar.stop () <br/> t_bar.join () </P> <p> def _ set_progress (t_BAR, percent, MSG = ""): <br/> t_bar.set_percent (percent) </P> <p> def _ print_msg (t_BAR, * ARGs ): <br/> "hide the progress bar and Print message" "</P> <p> assert t_BAR is none or isinstance (t_BAR, progressbar) </P> <p> If t_BAR and t_bar.is_alive (): <br/> _ stop_progress (t_BAR) </P> <p> Print ''. join (ARGs) </P> <p> def _ unicode_str_width (text): <br /> "Calculate the exact width of Unicode string. "</P> <p> width = 0 <br/> for char in text: <br/> If isinstance (char, Unicode ): <br/> If unicodedata. east_asian_width (char) in ('F', 'w', 'A'): <br/> width + = 2 <br/> else: <br/> width + = 1 <br/> else: <br/> width + = 1 </P> <p> return width </P> <p> # test the progress bar <br/> If _ name _ = = "_ main __": <br/> t_BAR = _ start_progress () <br/> COUNT = 0; <B R/> while count <100: <br/> _ set_progress (t_BAR, Count, '% d' % (count) <br/> sleep (0.1) <br/> COUNT = count + 1 </P> <p> _ stop_progress (t_BAR) <br/> Print "done!"

 

* In fact, several control functions can be encapsulated into a class for use, which is more convenient!