pandas UnicodeDecodeError:'charmap'编解码器无法解码位置7240中的字节0x8d:字符Map到< undefined>

kr98yfug  于 2023-05-15  发布在  其他
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我是一个正在写硕士论文的学生。作为我论文的一部分,我正在使用python。我正在阅读一个.csv的日志文件,并将提取的数据以格式良好的方式写入另一个.csv文件。然而,当读取文件时,我得到这个错误:
追溯(最近一次调用):文件“C:\Users\SGADI\workspace\DAB_Trace\my_code\trace_parcer.py”,第19行,读取器中的行:

  • 文件“C:\Users\SGADI\Desktop\Python-32bit-3.4.3.2\python-3.4.3\lib\encodings\cp1252.py”,line 23,in decode return codecs.charmap_decode(input,self.errors,decoding_table)[0]
  • UnicodeDecodeError:'charmap'编解码器无法解码位置7240中的字节0x 8d:字符Map到<undefined>
import csv
import re
#import matplotlib
#import matplotlib.pyplot as plt
import datetime
#import pandas
#from dateutil.parser import parse
#def parse_csv_file():
timestamp = datetime.datetime.strptime('00:00:00.000', '%H:%M:%S.%f')
timestamp_list = []
snr_list = []
freq_list = []
rssi_list = []
dab_present_list = []
counter = 0
f =  open("output.txt","w")
with open('test_log_20150325_gps.csv') as csvfile:
    reader = csv.reader(csvfile, delimiter=';') 
    for row in reader:
        #timestamp = datetime.datetime.strptime(row[0], '%M:%S.%f')
        #timestamp.split(" ",1)

        timestamp = row[0]
        timestamp_list.append(timestamp)

        #timestamp = row[0]
        details = row[-1]
        counter += 1
        print (counter)
        #if(counter > 25000):
        #  break
        #timestamp = datetime.datetime.strptime(row[0], '%M:%S.%f')  


        #timestamp_list.append(float(timestamp))

        #search for SNRLevel=\d+
        snr = re.findall('SNRLevel=(\d+)', details)
        if snr == []:
            snr = 0
        else:
            snr = snr[0]
        snr_list.append(int(snr))

        #search for Frequency=09ABC
        freq = re.findall('Frequency=([0-9a-fA-F]+)', details)
        if freq == []:
            freq = 0
        else:
            freq = int(freq[0], 16)
        freq_list.append(int(freq))

        #search for RSSI=\d+
        rssi = re.findall('RSSI=(\d+)', details)
        if rssi == []:
            rssi = 0
        else:
            rssi = rssi[0]
        rssi_list.append(int(rssi))

        #search for DABSignalPresent=\d+
        dab_present = re.findall('DABSignalPresent=(\d+)', details)
        if dab_present== []:
            dab_present = 0
        else:
            dab_present = dab_present[0]
        dab_present_list.append(int(dab_present))

        f.write(str(timestamp) + "\t")
        f.write(str(freq) + "\t")
        f.write(str(snr) + "\t")
        f.write(str(rssi) + "\t")
        f.write(str(dab_present) + "\n")
        print (timestamp, freq, snr, rssi, dab_present)

        #print (index+1)

        #print(timestamp,freq,snr)
        #print (counter)
#print(timestamp_list,freq_list,snr_list,rssi_list)

'''if  snr != []:
           if freq != []:
               timestamp_list.append(timestamp)
               snr_list.append(snr)
               freq_list.append(freq)
f.write(str(timestamp_list) + "\t")
f.write(str(freq_list) + "\t")
f.write(str(snr_list) + "\n")

print(timestamp_list,freq_list,snr_list)'''
f.close()

我搜索了特殊字符,但没有找到。我在互联网上搜索了建议更改格式的内容:我尝试了ut 8,latin 1和其他一些格式,但我仍然得到这个错误。请问你能帮我解决pandas以及。我也尝试了pandas,但我仍然得到错误。我甚至删除了日志文件中的一行,但错误出现在下一行。
请帮我想个办法,谢谢。

7fyelxc5

7fyelxc51#

我已经解决了这个问题。我们可以用这个代码

import codecs
types_of_encoding = ["utf8", "cp1252"]
for encoding_type in types_of_encoding:
    with codecs.open(filename, encoding = encoding_type, errors ='replace') as csvfile:
        your code
        ....
        ....
shyt4zoc

shyt4zoc2#

我通过在open()中添加一个参数解决了这个问题

with open(filename, encoding = 'cp850') as csv_file:
    csv_reader = csv.reader(csv_file, delimiter=',')
mm9b1k5b

mm9b1k5b3#

with open('input.tsv','rb') as f:
for ln in f:
    decoded=False
    line=''
    for cp in ('cp1252', 'cp850','utf-8','utf8'):
        try:
            line = ln.decode(cp)
            decoded=True
            break
        except UnicodeDecodeError:
            pass
    if decoded:
        # use 'line'
2guxujil

2guxujil4#

file = open(filename,encoding=“utf8”)

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