python - ZeroDivisionError - python-2.7

Question

I created a script which copy data to specific location. What i tried to do is print a results via progress-bar. I tried to use package : -> https://pypi.python.org/pypi/progressbar2
Here is my code:
src = raw_input("Enter source disk location: ")
src = os.path.abspath(src)
dst = raw_input("Enter first destination to copy: ")
dst = os.path.abspath(dst)
dest = raw_input("Enter second destination to move : ")
dest = os.path.abspath(dest)
for dir, dirs, files in os.walk(src):
if any(f.endswith('.mdi') for f in files):
dirs[:] = [] # do not recurse into subdirectories
continue # ignore this directory
files = [os.path.join(dir, f) for f in files]
progress, progress_maxval = 0, len(files) pbar = ProgressBar(widgets=['Progress ', Percentage(), Bar(), ' ', ETA(), ],maxval=progress_maxval).start()
debug_status = ''
for list in files:
part1 = os.path.dirname(list)
part2 = os.path.dirname(os.path.dirname(part1))
part3 = os.path.split(part1)[1]
path_miss1 = os.path.join(dst, "missing_mdi")
# ---------first location-------------------#
path_miss = os.path.join(path_miss1, part3)
# ---------second location-------------------#
path_missing = os.path.join(dest, "missing_mdi")
try:
# ---------first location-------------------#
if not os.path.exists(path_miss):
os.makedirs(path_miss)
else:
pass
if os.path.exists(path_miss):
distutils.dir_util.copy_tree(part1, path_miss)
else:
debug_status += "missing_file\n"
pass
if (get_size(path_miss)) == 0:
os.rmdir(path_miss)
else:
pass
# ---------second location-------------------#
if not os.path.exists(path_missing):
os.makedirs(path_missing)
else:
pass
if os.path.exists(path_missing):
shutil.move(part1, path_missing)
else:
debug_status += "missing_file\n"
if (get_size(path_missing)) == 0:
os.rmdir(path_missing)
else:
pass
except Exception:
pass
finally:
progress += 1
pbar.update(progress)
pbar.finish()
print debug_status
When i tried to execute it i got error and My Traceback is below:
Traceback (most recent call last):
File "<string>", line 254, in run_nodebug
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\CopyClass.py", in <module>
pbar = ProgressBar(widgets=['Progress ', Percentage(), Bar(), ' ', ETA(),],maxval=progress_maxval).start()
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\__init__.py", in start
self.update(0)
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\__init__.py", line 283, in update
self.fd.write(self._format_line() + '\r')
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\__init__.py", line 243, in _format_line
widgets = ''.join(self._format_widgets())
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\__init__.py", line 223, in _format_widgets
widget = format_updatable(widget, self)
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\widgets.py", in format_updatable
if hasattr(updatable, 'update'): return updatable.update(pbar)
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\widgets.py", in update
return '%3d%%' % pbar.percentage()
File "C:\Users\kostrzew\Desktop\REPORTS\ClassCopy\progressbar\__init__.py", line 208, in percentage
return self.currval * 100.0 / self.maxval
ZeroDivisionError: float division by zero
I know that there is a problem with "maxval=progress_maxval" because it can't be devided by zero.
My qestion is ,how to change it? Should i create exception to ignore zero ? How to do it ?

Answer 1

I think inside the ProgressBar its trying divide to zero. It calculates like this:
max_value - 100%
progress_value - x and from this formula if we find x? will be this:
x = (100 * progress_value) / max_value
for this solution set 1 instead of 0 for max_value.