我正在尝试遵循这个OpenCV练习http://coding-robin.de/2013/07/22/train-your-own-opencv-haar-classifier.html但是却陷入了运行mergevec.py的步骤(我使用的是Python版本而不是.cpp) . 我在本文中使用Python 3而不是Python 2.x.
该文件的来源是https://github.com/wulfebw/mergevec/blob/master/mergevec.py
我得到的错误是
Traceback (most recent call last):
File "./tools/mergevec1.py", line 96, in <module>
merge_vec_files(vec_directory, output_filename)
File "./tools/mergevec1.py", line 45, in merge_vec_files
val = struct.unpack('<iihh', content[:12])
TypeError: a bytes-like object is required, not 'str'
我试图按照python 3.5: TypeError: a bytes-like object is required, not 'str' when writing to a file并使用 open(f, 'r', encoding='utf-8', errors='ignore')
但仍然没有运气 .
我的修改后的代码如下:
import sys
import glob
import struct
import argparse
import traceback
def exception_response(e):
exc_type, exc_value, exc_traceback = sys.exc_info()
lines = traceback.format_exception(exc_type, exc_value, exc_traceback)
for line in lines:
print(line)
def get_args():
parser = argparse.ArgumentParser()
parser.add_argument('-v', dest='vec_directory')
parser.add_argument('-o', dest='output_filename')
args = parser.parse_args()
return (args.vec_directory, args.output_filename)
def merge_vec_files(vec_directory, output_vec_file):
# Check that the .vec directory does not end in '/' and if it does, remove it.
if vec_directory.endswith('/'):
vec_directory = vec_directory[:-1]
# Get .vec files
files = glob.glob('{0}/*.vec'.format(vec_directory))
# Check to make sure there are .vec files in the directory
if len(files) <= 0:
print('Vec files to be mereged could not be found from directory: {0}'.format(vec_directory))
sys.exit(1)
# Check to make sure there are more than one .vec files
if len(files) == 1:
print('Only 1 vec file was found in directory: {0}. Cannot merge a single file.'.format(vec_directory))
sys.exit(1)
# Get the value for the first image size
prev_image_size = 0
try:
with open(files[0], 'r', encoding='utf-8', errors='ignore') as vecfile:
content = ''.join(str(line) for line in vecfile.readlines())
val = struct.unpack('<iihh', content[:12])
prev_image_size = val[1]
except IOError as e:
f = None
print('An IO error occured while processing the file: {0}'.format(f))
exception_response(e)
# Get the total number of images
total_num_images = 0
for f in files:
try:
with open(f, 'r', encoding='utf-8', errors='ignore') as vecfile:
content = ''.join(str(line) for line in vecfile.readlines())
val = struct.unpack('<iihh', content[:12])
num_images = val[0]
image_size = val[1]
if image_size != prev_image_size:
err_msg = """The image sizes in the .vec files differ. These values must be the same. \n The image size of file {0}: {1}\n
The image size of previous files: {0}""".format(f, image_size, prev_image_size)
sys.exit(err_msg)
total_num_images += num_images
except IOError as e:
print('An IO error occured while processing the file: {0}'.format(f))
exception_response(e)
# Iterate through the .vec files, writing their data (not the header) to the output file
# '<iihh' means 'little endian, int, int, short, short'
header = struct.pack('<iihh', total_num_images, image_size, 0, 0)
try:
with open(output_vec_file, 'wb') as outputfile:
outputfile.write(header)
for f in files:
with open(f, 'w', encoding='utf-8', errors='ignore') as vecfile:
content = ''.join(str(line) for line in vecfile.readlines())
data = content[12:]
outputfile.write(data)
except Exception as e:
exception_response(e)
if __name__ == '__main__':
vec_directory, output_filename = get_args()
if not vec_directory:
sys.exit('mergvec requires a directory of vec files. Call mergevec.py with -v /your_vec_directory')
if not output_filename:
sys.exit('mergevec requires an output filename. Call mergevec.py with -o your_output_filename')
merge_vec_files(vec_directory, output_filename)
你知道我做错了吗?谢谢 .
UPDATE 1
我这样做了:
content = b''.join(str(line) for line in vecfile.readlines())
我基本上在前面添加了“b” . 但是,现在我得到了一个不同的错误:
回溯(最近一次调用最后一次):文件“./tools/mergevec1.py”,第97行,在merge_vec_files(vec_directory,output_filename)文件“./tools/mergevec1.py”,第44行,在merge_vec_files内容= b'' .join(vecfile.readlines()中行的str(行)TypeError:序列项0:期望找到类似字节的对象,str找到
1 回答
尝试更改此代码块,如下所示: