# -*- coding: utf-8 -*-

'''

Created on Feb 1, 2012

@author: ymh

'''

import sys

import codecs #@UnresolvedImport

import math

def show_progress(current_line, total_line, label, width, writer=None):

    if writer is None:

        writer = sys.stdout

        if sys.stdout.encoding is not None:

            writer = codecs.getwriter(sys.stdout.encoding)(sys.stdout)

    percent = (float(current_line) / float(total_line)) * 100.0

    marks = math.floor(width * (percent / 100.0)) #@UndefinedVariable

    spaces = math.floor(width - marks) #@UndefinedVariable

    loader = u'[' + (u'=' * int(marks)) + (u' ' * int(spaces)) + u']'

    s = u"%s %3d%% %*d/%d - %*s\r" % (loader, percent, len(str(total_line)), current_line, total_line, width, label[:width])

    writer.write(s) #takes the header into account

    if percent >= 100:

        writer.write("\n")

    writer.flush()

    return writer