如何从日志文件中读取数据，然后计算结果并使用python绘制图表

Question

我有一个如下所示的日志文件：

# seconds.nanoseconds+offset(sequence)
1737119268.154152577+1.009023e-03(0)
1737119268.174213704+1.055868e-03(1)
1737119268.194189758+9.929340e-04(2)
1737119268.214228223+1.148472e-03(3)
1737119268.234281484+1.086814e-03(4)
1737119268.254280558+1.110649e-03(5)
1737119268.274280203+1.066759e-03(6)
1737119268.294279759+1.261670e-03(7)
1737119268.314287395+1.231778e-03(8)
1737119268.334195574+9.443450e-04(9)
1737119268.354297130+9.879940e-04(10)
1737119268.374272817+1.080131e-03(11)
1737119268.394278885+1.024396e-03(12)
1737119268.414284465+9.852860e-04(13)
1737119268.434281287+1.055045e-03(14)
1737119268.454279880+1.374439e-03(15)
1737119268.474283558+1.287552e-03(16)
1737119268.494280915+1.188272e-03(17)
1737119268.514209498+9.444750e-04(18)

我想写一个python脚本从日志文件中读取数据，然后计算结果，例如：1737119268.154152577+1.009023e-03并将数字拆分为“(0)”。然后我希望这个 python 脚本绘制计算结果的图表。 到目前为止我尝试过这个

log_Name = 'test_rtt_25-01-17_13-07-41_values5_rate50.log'
log_Path = "/home/ubuntu/results-25-01-09-docker/"
true_Path = log_Path + log_Name
with open(true_Path, "r") as f:
    lines = f.readlines()
    data = []
    for line in lines:
        print(line)
        data.append(line.split('('))

print(data)

但我并没有真正得到我想要的，我也不知道如何让脚本计算并绘制结果图表。请帮忙，非常感谢！

Answer 1

您需要将每一行分割两次：首先在 ( 将时间与序列分开，然后在 + 上分割时间以计算总数。这是我的做法：

import matplotlib.pyplot as plt

# Read and process data
timestamps = []
sequences = []

# I put the log file information in log.txt, just to make it easier for me.
with open('log.txt', 'r') as f:
    for line in f:
        if not line.startswith('#'):    
            # Split "1737119268.154152577+1.009023e-03(0)" into time and sequence
            time_part, seq_part = line.strip().split('(')
            
            # Split "1737119268.154152577+1.009023e-03" into base and offset
            base, offset = time_part.split('+')
            
            # Calculate total time
            total = float(base) + float(offset)
            timestamps.append(total)
            
            # Get sequence number (remove trailing ')')
            seq = int(seq_part[:-1])
            sequences.append(seq)

# Plot
plt.figure(figsize=(10, 8))
plt.plot(sequences, timestamps, 'b.-')  # Blue line with dots
plt.xlabel('Sequence')
plt.ylabel('Time (seconds)')
plt.grid(True)
plt.show()

这会生成此图：