Download file to local with a nice progress bar and time estimate.

download_file.py

from datetime import timedelta
from requests import get
from time import time
from sys import stdout

def bytes_to_human(size, decimal_places=2):
	for unit in ["", "k", "M", "G", "T", "P", "E", "Z", "Y"]:
		if size < 1024: break
		size /= 1024
	return "%s%sB" % (round(size, decimal_places), unit)

def seconds_to_human(seconds):
	return str(timedelta(seconds=int(seconds))).zfill(8)

def download_file(url, path=None, chunk_size=10**5):
	""" Downloads a file keeping track of the progress. """
	if path == None: path = url.split("/")[-1]
	r = get(url, stream=True)
	total_bytes = int(r.headers.get('content-length'))
	bytes_downloaded = 0
	start = time()
	print("Downloading %s (%s)" % (url, bytes_to_human(total_bytes)))
	with open(path, "wb") as fp:
		for chunk in r.iter_content(chunk_size=chunk_size):
			if not chunk: continue
			fp.write(chunk)
			bytes_downloaded += len(chunk)
			percent = bytes_downloaded / total_bytes
			bar = ("█" * int(percent * 32)).ljust(32)
			time_delta = time() - start
			eta = seconds_to_human((total_bytes - bytes_downloaded) * time_delta / bytes_downloaded)
			avg_speed = bytes_to_human(bytes_downloaded / time_delta).rjust(9)
			stdout.flush()
			stdout.write("\r  %6.02f%% |%s| %s/s eta %s" % (100 * percent, bar, avg_speed, eta))
	print()

if __name__ == "__main__":
	download_file("https://upload.wikimedia.org/wikipedia/commons/3/3f/Fronalpstock_big.jpg")