Question

因此，我正在编写用于对csv文件的数据集进行实时映射的代码。数据的格式为（“字符串”，整数）。最初，它必须作为两个不同的程序运行，因此我想将它们都线程化并作为一个程序运行。代码是：

import _thread
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from matplotlib import style
import csv
import time

def firstfunc(a):
    count=0
    with open('airtabletest.txt','r') as dataset:
        line=csv.reader(dataset)
        arr=[]
        for row in line:
            if(len(arr)>=9):
                arr.clear()
            for i in range(1,10):
                arr.append(int(row[i]))
            t=time.time()+3
            while(t>time.time()):
                    pass
            if(count>=8):
                with open('live_graph1','r') as file:
                    lines=file.readlines()
                with open('live_graph1','w') as csvfile:
                    csvfile.writelines(lines[1:])
            with open('live_graph1','a+') as file:
                arr2=[]
                writer=csv.writer(file)
                arr2.append(row[0][11:])
                arr2.append(sum(arr)/10)
                writer.writerow(arr2)
                count+=1

def secondfunc(b):
    style.use('fivethirtyeight')

    fig = plt.figure()
    ax1 = fig.add_subplot(1,1,1)
    def animate(i):
        xs = []
        ys = []
        count=0
        label=[]
        with open('live_graph1','r') as file:
            reader=csv.reader(file)
            for row in reader:
                if(len(row) == 2):
                    x = float(row[1])
                    xs.append(count)
                    ys.append(x)
                    label.append(row[0])
                    count+=1
            ax1.clear()
            ax1.set_xticks(xs)
            ax1.set_xticklabels(label)
            ax1.plot(xs,ys)
            fig.autofmt_xdate()
    ani = animation.FuncAnimation(fig, animate, interval=1000)
    plt.show()

def main():
    try:
        _thread.start_new_thread(secondfunc,(Thread2,))
        _thread.start_new_thread(firstfunc,(tHREAD1,))
    except RuntimeError:
        pass

    while 1:
        pass

if __name__=='__main__':main()

我得到的错误是：

  File "test.py", line 65
    while 1:
        ^
SyntaxError: invalid syntax

即使假设暂时我删除了while循环，那么错误仍然是：

  File "test.py", line 66
    if __name__=='__main__':main()
    ^
IndentationError: unexpected unindent

据我所知，语法还可以。谁能解释我做错了什么吗？编辑：作为一些答案建议，我添加了除外声明。然后它在_thread.start_new_thread函数中要求2个参数。这样做之后，我得到了这个错误：

Traceback (most recent call last):
  File "test.py", line 71, in <module>
    if __name__=='__main__':main()
  File "test.py", line 63, in main
    _thread.start_new_thread(secondfunc,(Thread2,))
NameError: name 'Thread2' is not defined

Answer 1

所以问题出在除调整之后，实际上是您在线程中调用函数而没有传递任何参数，因为线程需要参数和函数都可以工作，否则会抛出仅需要两个给定一个arg的错误，因此顺序修复如果我们的函数不带参数的话，我们可以将一个空元组作为arg传递。

那是什么

_thread.start_new_thread(firstfunc,)

现在是这个

_thread.start_new_thread(firstfunc,())

这应该有效

导入_thread 导入matplotlib.pyplot作为plt 导入matplotlib.animation作为动画从matplotlib导入样式导入csv 导入时间

def firstfunc():
    count=0
    with open('airtabletest.txt','r') as dataset:
        line=csv.reader(dataset)
        arr=[]
        for row in line:
            if(len(arr)>=9):
                arr.clear()
            for i in range(1,10):
                arr.append(int(row[i]))
            t=time.time()+3
            while(t>time.time()):
                    pass
            if(count>=8):
                with open('live_graph1','r') as file:
                    lines=file.readlines()
                with open('live_graph1','w') as csvfile:
                    csvfile.writelines(lines[1:])
            with open('live_graph1','a+') as file:
                arr2=[]
                writer=csv.writer(file)
                arr2.append(row[0][11:])
                arr2.append(sum(arr)/10)
                writer.writerow(arr2)
                count+=1

def secondfunc():
    style.use('fivethirtyeight')

    fig = plt.figure()
    ax1 = fig.add_subplot(1,1,1)
    def animate(i):
        xs = []
        ys = []
        count=0
        label=[]
        with open('live_graph1','r') as file:
            reader=csv.reader(file)
            for row in reader:
                if(len(row) == 2):
                    x = float(row[1])
                    xs.append(count)
                    ys.append(x)
                    label.append(row[0])
                    count+=1
            ax1.clear()
            ax1.set_xticks(xs)
            ax1.set_xticklabels(label)
            ax1.plot(xs,ys)
            fig.autofmt_xdate()
    ani = animation.FuncAnimation(fig, animate, interval=1000)
    plt.show()

def main():
    try:
        _thread.start_new_thread(secondfunc,())
        _thread.start_new_thread(firstfunc,())
    except RuntimeError as e:
        print(e)
    while 1:
        pass

if __name__=='__main__':main()

您的代码出现语法错误的原因是，您需要指定 try 失败时的处理方法。即必须指定除外：

我也相信您的代码中只有1个总是返回true，并且似乎根本没有做任何事情

Answer 2

如何添加

except RuntimeError:
    pass

还是尝试后类似的东西？

python代码中的线程错误？

2 个答案: