我想解析.ubx文件（=我的输入文件）。该文件包含许多不同的NMEA语句以及原始接收者数据。输出文件应该只包含GGA句子中的信息。只要.ubx文件不包含任何原始消息，这样就可以正常工作。但是，如果它包含原始数据 我收到以下错误：
追踪（最近一次通话）： 文件“C：... myParser.py”，第25行，in 读者行： 错误：行包含NULL字节
我的代码如下所示：
import csv
from datetime import datetime
import math
# adapt this to your file
INPUT_FILENAME = 'Rover.ubx'
OUTPUT_FILENAME = 'out2.csv'
# open the input file in read mode
with open(INPUT_FILENAME, 'r') as input_file:
# open the output file in write mode
with open(OUTPUT_FILENAME, 'wt') as output_file:
# create a csv reader object from the input file (nmea files are basically csv)
reader = csv.reader(input_file)
# create a csv writer object for the output file
writer = csv.writer(output_file, delimiter=',', lineterminator='\n')
# write the header line to the csv file
writer.writerow(['Time','Longitude','Latitude','Altitude','Quality','Number of Sat.','HDOP','Geoid seperation','diffAge'])
# iterate over all the rows in the nmea file
for row in reader:
if row[0].startswith('$GNGGA'):
time = row[1]
# merge the time and date columns into one Python datetime object (usually more convenient than having both separately)
date_and_time = datetime.strptime(time, '%H%M%S.%f')
date_and_time = date_and_time.strftime('%H:%M:%S.%f')[:-6] #
writer.writerow([date_and_time])
我的.ubx文件如下所示：
$GNGSA,A,3,16,25,29,20,31,26,05,21,,,,,1.30,0.70,1.10*10
$GNGSA,A,3,88,79,78,81,82,80,72,,,,,,1.30,0.70,1.10*16
$GPGSV,4,1,13,02,08,040,17,04,,,47,05,18,071,44,09,02,348,24*49
$GPGSV,4,2,13,12,03,118,24,16,12,298,36,20,15,118,30,21,44,179,51*74
$GPGSV,4,3,13,23,06,324,35,25,37,121,47,26,40,299,48,29,60,061,49*73
$GPGSV,4,4,13,31,52,239,51*42
$GLGSV,3,1,10,65,07,076,24,70,01,085,,71,04,342,34,72,13,029,35*64
$GLGSV,3,2,10,78,35,164,41,79,75,214,48,80,34,322,46,81,79,269,49*64
$GLGSV,3,3,10,82,28,235,52,88,39,043,43*6D
$GNGLL,4951.69412,N,00839.03672,E,124610.00,A,D*71
$GNGST,124610.00,12,,,,0.010,0.010,0.010*4B
$GNZDA,124610.00,03,07,2016,00,00*79
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AÝ$GNRMC,124611.00,A,4951.69413,N,00839.03672,E,0.009,,030716,,,D*62
$GNVTG,,T,,M,0.009,N,0.016,K,D*36
$GNGNS,124611.00,4951.69413,N,00839.03672,E,RR,15,0.70,162.5,47.6,1.0,0000*42
$GNGGA,124611.00,4951.69413,N,00839.03672,E,4,12,0.70,162.5,M,47.6,M,1.0,0000*6A
$GNGSA,A,3,16,25,29,20,31,26,05,21,,,,,1.31,0.70,1.10*11
$GNGSA,A,3,88,79,78,81,82,80,72,,,,,,1.31,0.70,1.10*17
$GPGSV,4,1,13,02,08,040,18,04,,,47,05,18,071,44,09,02,348,21*43
$GPGSV,4,2,13,12,03,118,24,16,
我已经搜索过类似的问题了。但是我无法找到适合我的解决方案。
我最终得到了这样的代码：
import csv
def unfussy_reader(csv_reader):
while True:
try:
yield next(csv_reader)
except csv.Error:
# log the problem or whatever
print("Problem with some row")
continue
if __name__ == '__main__':
#
# Generate malformed csv file for
# demonstration purposes
#
with open("temp.csv", "w") as fout:
fout.write("abc,def\nghi\x00,klm\n123,456")
#
# Open the malformed file for reading, fire up a
# conventional CSV reader over it, wrap that reader
# in our "unfussy" generator and enumerate over that
# generator.
#
with open("Rover.ubx") as fin:
reader = unfussy_reader(csv.reader(fin))
for n, row in enumerate(reader):
fout.write(row[0])
但是我无法使用上面的代码简单地编写一个包含unfuss_reader包装器读入的所有行的文件。
如果你能帮助我，我会很高兴的。
以下是.ubx文件在notepad ++ image
中的外观图谢谢！
答案 0 :(得分：0)
我不太确定，但你的文件看起来很漂亮。您应该尝试打开它
with open(INPUT_FILENAME, 'rb') as input_file:
答案 1 :(得分：0)
好像你没有用正确的编码格式打开文件。 因此无法正确读取原始消息。
如果编码为UTF8，则需要使用编码选项打开文件：
with open(INPUT_FILENAME, 'r', newline='', encoding='utf8') as input_file
答案 2 :(得分：0)
嘿，如果有其他人有这个proglem读取UBlox .ubx文件的NMEA句子 这个pyhton代码对我有用：
def read_in():
with open('GNGGA.txt', 'w') as GNGGA:
with open('GNRMC.txt','w') as GNRMC:
with open('rover.ubx', 'rb') as f:
for line in f:
#print line
if line.startswith('$GNGGA'):
#print line
GNGGA.write(line)
if line.startswith('$GNRMC'):
GNRMC.write(line)
read_in（）