yolov5训练自己的数据集问题排除_raise importerror(err) importerror: bad git execut

PS:笔者以下问题都是基于在yolov5-v6.0版本出现

问题1：在运行train.py时出现以下报错

D:\ProgramData\Anaconda3\envs\yolov5\python.exe D:/yxt/yolov5-master/train.py
Traceback (most recent call last):
  File "D:\ProgramData\Anaconda3\envs\yolov5\lib\site-packages\git\__init__.py", line 140, in <module>
    refresh()
  File "D:\ProgramData\Anaconda3\envs\yolov5\lib\site-packages\git\__init__.py", line 127, in refresh
    if not Git.refresh(path=path):
  File "D:\ProgramData\Anaconda3\envs\yolov5\lib\site-packages\git\cmd.py", line 455, in refresh
    raise ImportError(err)
ImportError: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial message can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|silent|none|n|0: for no message or exception
    - warn|w|warning|log|l|1: for a warning message (logged at level CRITICAL, displayed by default)
    - error|e|exception|raise|r|2: for a raised exception

Example:
    export GIT_PYTHON_REFRESH=quiet

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:/yxt/yolov5-master/train.py", line 100, in <module>
    GIT_INFO = check_git_info()
  File "D:\ProgramData\Anaconda3\envs\yolov5\lib\contextlib.py", line 75, in inner
    return func(*args, **kwds)
  File "D:\yxt\yolov5-master\utils\general.py", line 375, in check_git_info
    import git
  File "D:\ProgramData\Anaconda3\envs\yolov5\lib\site-packages\git\__init__.py", line 142, in <module>
    raise ImportError("Failed to initialize: {0}".format(_exc)) from _exc
ImportError: Failed to initialize: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial message can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|silent|none|n|0: for no message or exception
    - warn|w|warning|log|l|1: for a warning message (logged at level CRITICAL, displayed by default)
    - error|e|exception|raise|r|2: for a raised exception

Example:
    export GIT_PYTHON_REFRESH=quiet

Process finished with exit code 1

解决方法：

通过查询网友的解释，可能时因为yolov5的获取方式时直接下载的zip导致的，不是通过git方式下载会出现这个问题，可以通过以下解决

在cmd.py中
import os
os.environ["GIT_PYTHON_REFRESH"] = "quiet"
import signal

问题2：

    data = self.stream.read(size)
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 234: illegal multibyte sequence
COMET INFO: Couldn't find a Git repository in 'D:\\yxt\\yolov5-master' nor in any parent directory. Set `COMET_GIT_DIRECTORY` if your Git Repository is elsewhere.
COMET WARNING: Unknown error exporting current conda environment

解决方法：

 在修改自己的数据集时，往往时通过复制coco128.yaml文件再修改得到，这时候自己的yaml文件中可能存在不能解释的字符，以下两种方式都可以解决，

第一种：

# parent
# ├── yolov5
# └── datasets
#     └── coco128  ← downloads here (7 MB)

第二种，也可以修改成如下所示：

# parent
# |--yolov5
# |--datasets
#     |--coco128 <- downloads here (7 MB)

问题3：

COMET INFO: Couldn't find a Git repository in 'D:\\yxt\\yolov5-master' nor in any parent directory. Set `COMET_GIT_DIRECTORY` if your Git Repository is elsewhere.
COMET WARNING: Unknown error exporting current conda environment

解决方法：

这个报错暂时未修改，因为没有影响到训练。 

问题4：

raise Exception("Dataset not found ❌") Exception: Dataset not found ❌

解决方法：

这种问题通常是设置的数据集路径不对

要注意路径的datasets通常时与yolov5的工程路径在同一级目录下，不能放到yolov5工程目录下，修改目录即可以解决。