如何修复ValueError:没有足够的值来解压缩(预期2,得到1)在python中?

问题描述 投票:0回答:3

我想监视我的docker容器ram使用。现在我发现一个在线脚本生成一个txt文件,其中包含如下统计信息:

LOG_FILE="/volume1/docker/docker-logs.txt"

while true;
do
    sleep 10m
    docker stats --format "{{.Name}}, {{.MemUsage}}" --no-stream >> $LOG_FILE
    #echo "-" >> $LOG_FILE
done

使用我的Synology NAS让它在启动时运行。工作正常我得到这个文件:

-
Python3, 46.42MiB / 150MiB
hassio, 160.8MiB / 3.855GiB
Jacket, 255.4MiB / 3.855GiB
Radarrnodebug, 96.87MiB / 3.855GiB
Sonarrnodebug, 112.8MiB / 3.855GiB
Ombii, 212.2MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-
Python3, 46.42MiB / 150MiB
hassio, 68.34MiB / 3.855GiB
Jacket, 258.3MiB / 3.855GiB
Radarrnodebug, 101.8MiB / 3.855GiB
Sonarrnodebug, 114.8MiB / 3.855GiB
Ombii, 212.4MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-
Python3, 46.42MiB / 150MiB
hassio, 71.06MiB / 3.855GiB
Jacket, 262.7MiB / 3.855GiB
Radarrnodebug, 102.2MiB / 3.855GiB
Sonarrnodebug, 124.1MiB / 3.855GiB
Ombii, 217.7MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-
Python3, 46.42MiB / 150MiB
hassio, 81.38MiB / 3.855GiB
Jacket, 262.7MiB / 3.855GiB
Radarrnodebug, 102.5MiB / 3.855GiB
Sonarrnodebug, 125.1MiB / 3.855GiB
Ombii, 217.6MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-
Python3, 46.42MiB / 150MiB
hassio, 76.55MiB / 3.855GiB
Jacket, 269.2MiB / 3.855GiB
Radarrnodebug, 103.3MiB / 3.855GiB
Sonarrnodebug, 123.8MiB / 3.855GiB
Ombii, 219MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-
Python3, 46.42MiB / 150MiB
hassio, 77.52MiB / 3.855GiB
Jacket, 268.4MiB / 3.855GiB
Radarrnodebug, 106.2MiB / 3.855GiB
Sonarrnodebug, 117.8MiB / 3.855GiB
Ombii, 213.1MiB / 3.855GiB
watchtower, 11.48MiB / 50MiB
-

现在让它成为一个不错的PNG我有以下几点:

from pip._internal import main
main(["install", "matplotlib", "numpy","pandas"])

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd

log_path = "/stats/docker-logs.txt"

with open(log_path) as f:
    raw_data = f.readlines()
nrows = 8
n = len(raw_data) // nrows
data = []
for i in range(n):
    start = i * nrows
    end = start + nrows - 1
    d = raw_data[start:end]
    datum = {}
    datum['i'] = i
    for line in d:
        name, stats = line.strip().split(',')
        stats = float(stats.split('/')[0].strip()[:-3])
        datum[name] = stats
    data.append(datum)

data = pd.DataFrame(data)
data['time (hour)'] = data['i'] * 10 / 60
ax = data.drop(columns='i').set_index('time (hour)').plot()
ax.set_ylabel('RAM Usage (MiB)')
ax.figure.savefig('/stats/plot.png')

哪个在beginnen中工作得很好,但是它突然停止工作,我得到了以下错误:

Traceback (most recent call last):
  File "/stats/genstat.py", line 22, in <module>
    name, stats = line.strip().split(',')
ValueError: not enough values to unpack (expected 2, got 1)

做了一些调试,发现了

var i

成为0所以没有任何工作了(因为它必须跳过“ - ”char)发生了什么,我该如何修复它?我已经通过删除“ - ”char尝试了很多,但是没有什么真正重要的(对于meeeee)

希望有些人可以帮忙

python python-3.x
3个回答
0
投票

这更pythonic:

if ',' not in line:
    continue
name, stats = line.strip().split(',')

0
投票

这条线

name, stats = line.strip().split(',')

失败,因为输入文件中有一行没有逗号。最后很可能是一个空白行。做

columns = line.strip().split(',')
if len(columns) == 2:
    name, stats = columns
else:
    print("Expected name and stats, got", columns)

0
投票

试试这个:

if line.count(',') != 1:
    continue
name, stats = line.strip().split(',')
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