how to cal how many bytes do you shrink from png ..etc to webp in android studio

cal.py

# coding: utf8
#see https://developer.android.com/studio/write/convert-webp.html
from functools import reduce

intBase = 1024
intKB = intBase
intMB = intKB * intBase
intGB = intMB * intBase


def str2int(str):
    if str.endswith("bytes"):
        return int(str[:-6])
    elif str.endswith("KB"):
        return int(float(str[:-3]) * intKB)
    elif str.endswith("MB"):
        return int(float(str[-3]) * intMB)
    else:
        raise AssertionError("input format unexpected")


f = open("log.txt", encoding="utf8")

lines = map(lambda str: str.strip(), f.readlines())
//下午 means am, 下午 means pm, if you are using english, replace with your own
lines = filter( lambda str: (str.startswith("下午")
                             or str.startswith("上午"))
                            and str[-5:] == 'saved',lines)
lines = map(lambda str: str[7:][:-6],lines)
lines = map(str2int, lines)
bytes_count = reduce(lambda y,x:y+x, lines, 0)

def bytesPrinter(amountInbytes):
    result = ''
    if (amountInbytes > intGB):
        l,d = (amountInbytes//intGB, amountInbytes%intGB)
        if l > 0:
            result+=str(l)+"GB"
        amountInbytes = d

    if amountInbytes > intMB:
        l,d = (amountInbytes//intMB, amountInbytes%intMB)
        if l > 0:
            result+=str(l)+"MB"
        amountInbytes = d

    if amountInbytes > intKB:
        l,d = (amountInbytes//intKB, amountInbytes%intKB)
        if l > 0:
            result+=str(l)+"KB"
        amountInbytes = d

    if amountInbytes > 0:
        result+=str(amountInbytes)+"bytes"

    return result

print("reduced amount is :", bytesPrinter(bytes_count))
f.close()

log.txt

#I copied it from Android Studio messages tab
下午2:40	66.6 KB saved

下午2:41	77.7 KB saved

下午2:41	1.3 KB saved

下午2:42	1.3 KB saved

下午2:42	1.2 KB saved

下午2:44	66.6 KB saved

下午2:45	1.4 KB saved

下午2:46	1.2 KB saved

下午2:46	0 files were converted
				1 9-patch files were skipped

下午2:47	29.5 KB saved

下午2:47	2.9 KB saved

下午2:48	1.4 KB saved

下午2:48	959 bytes saved

下午2:48	1.4 KB saved

下午2:48	1.2 KB saved

下午2:49	1.3 KB saved

下午2:49	1.9 KB saved

下午2:49	1.3 KB saved

下午2:50	1.1 KB saved

下午2:50	1.2 KB saved

下午2:51	605 bytes saved

下午2:51	7.6 KB saved

下午2:51	1008 bytes saved

下午2:51	2.5 KB saved

下午2:51	462 bytes saved

下午2:51	1.2 KB saved

下午2:51	155.5 KB saved

下午2:52	5.3 KB saved

下午2:52	6.5 KB saved

下午2:52	850 bytes saved

下午2:52	4.3 KB saved

下午2:53	3.1 KB saved

下午2:53	1.3 KB saved

下午2:54	3.2 KB saved

下午2:55	1.4 KB saved

下午2:55	2.8 KB saved

下午2:55	1.4 KB saved

下午2:55	0 files were converted
				1 9-patch files were skipped

下午2:55	16 files were converted
				19.7 KB saved

下午2:56	3 files were converted
				2.9 KB saved

下午2:56	66.3 KB saved

下午2:56	866 bytes saved

下午2:57	12 files were converted
				9.6 KB saved

下午2:57	33.0 KB saved

下午2:58	8 files were converted
				5.2 KB saved

下午2:58	1.9 KB saved

下午2:58	58.2 KB saved

下午3:00	138.4 KB saved

下午3:01	24 files were converted
				26.3 KB saved

下午3:01	580 bytes saved

下午3:01	14.6 KB saved

下午3:02	2.3 KB saved

下午3:02	12.2 KB saved

下午3:02	12.3 KB saved

下午3:02	194 bytes saved

下午3:03	9.0 KB saved

下午3:03	11.7 KB saved

下午3:03	10.6 KB saved

下午3:03	66.6 KB saved

下午3:04	617 bytes saved

下午3:04	62.3 KB saved

下午3:05	1.1 KB saved

下午3:05	18.1 KB saved

下午3:05	18.3 KB saved

下午3:05	709 bytes saved

下午3:06	1.5 KB saved

下午3:06	1.8 KB saved

下午3:06	2.3 KB saved

下午3:06	1.3 KB saved

下午3:07	2.0 KB saved

下午3:07	0 files were converted
				0 bytes saved
				1 launcher icons were skipped

下午3:08	5.1 KB saved

下午3:08	62 bytes saved

下午3:09	22.8 KB saved

下午3:09	0 files were converted
				1 9-patch files were skipped

下午3:09	438 bytes saved

下午3:09	95 bytes saved

下午3:09	85 bytes saved

下午3:10	962 bytes saved

下午3:10	624 bytes saved

下午3:10	1.1 KB saved

下午3:10	933 bytes saved

下午3:10	66 bytes saved