我有一个相当简单的用例，但我不理解收到的错误消息。
我正在使用 requests 和 Pyral 模块，pyral ( http://pyral.readthedocs.io/en/latest/interface.html# ) 实际上只是 Rally 的 Restful api 的包装器。我的目标是从 Rally(CA 产品)UserStory 获取文件(附件)并将其存储到本地文件系统。
对于上下文，这是我的环境设置(验证 Rally 并创建一个对象)。我显然已经删除了身份验证信息。
from pyral import Rally, rallyWorkset
options = [arg for arg in sys.argv[1:] if arg.startswith('--')]
args = [arg for arg in sys.argv[1:] if arg not in options]
server, user, password, apikey, workspace, project = rallyWorkset(options)
rally = Rally(server='rally1.rallydev.com',
user='**********', password='***********',
apikey="**************",
workspace='**************', project='**************',
server_ping=False)
之后，我仅获得一个用户故事的响应对象(请参阅 US845 的查询)，我这样做只是为了简化问题。
r = rally.get('UserStory', fetch = True, projectScopeDown=True, query = 'FormattedID = US845')
然后我使用内置迭代器从 RallyRESTResponse 对象获取用户故事。
us = r.next()
从那里感觉我应该能够轻松使用接受工件(us)和文件名(附件名称)的 getAttachment() 方法。我可以使用 getAttachmentNames(us) 返回附件名称列表。当我尝试类似的事情时，问题就出现了
attachment_names = rally.getAttachmentNames(us) #get attachments for this UserStory
attachment_file = rally.getAttachment(us, attachment_names[0]) #Try to get the first attachment
返回这样的错误
Traceback (most recent call last):
File "<ipython-input-81-a4a342a59c5a>", line 1, in <module>
attachment_file = rally.getAttachment(us, attachment_names[0])
File "C:\Miniconda3\lib\site-packages\pyral\restapi.py", line 1700, in getAttachment
att.Content = base64.decodebytes(att_content.Content) # maybe further txfm to Unicode ?
File "C:\Miniconda3\lib\base64.py", line 552, in decodebytes
_input_type_check(s)
File "C:\Miniconda3\lib\base64.py", line 520, in _input_type_check
raise TypeError(msg) from err
TypeError: expected bytes-like object, not str
如果我尝试使用，我会收到类似的错误
test_obj = rally.getAttachments(us)
这会返回如下错误:
Traceback (most recent call last):
File "<ipython-input-82-06a8cd525177>", line 1, in <module>
rally.getAttachments(us)
File "C:\Miniconda3\lib\site-packages\pyral\restapi.py", line 1721, in getAttachments
attachments = [self.getAttachment(artifact, attachment_name) for attachment_name in attachment_names]
File "C:\Miniconda3\lib\site-packages\pyral\restapi.py", line 1721, in <listcomp>
attachments = [self.getAttachment(artifact, attachment_name) for attachment_name in attachment_names]
File "C:\Miniconda3\lib\site-packages\pyral\restapi.py", line 1700, in getAttachment
att.Content = base64.decodebytes(att_content.Content) # maybe further txfm to Unicode ?
File "C:\Miniconda3\lib\base64.py", line 552, in decodebytes
_input_type_check(s)
File "C:\Miniconda3\lib\base64.py", line 520, in _input_type_check
raise TypeError(msg) from err
TypeError: expected bytes-like object, not str
看来我从根本上误解了该方法所需的参数？以前有人能够成功地做到这一点吗？就其值(value)而言，我使用 addAttachment() 方法和与上述类似的工作流程没有任何问题。我尝试使用 bytes() 方法将文件名(字符串)转换为 utf-8，但这没有帮助。
我还在 Pyral 源中查看了这个示例，但在尝试执行该示例时收到了完全相同的错误。
https://github.com/klehman-rally/pyral/blob/master/examples/get_attachments.py
最佳答案
看起来像restapi.py脚本中的问题-base64库中没有decodebytes方法:
att.Content = base64.decodebytes(att_content.Content)
所有可用方法的描述如下:
RFC 3548: Base16, Base32, Base64 Data Encodings
因此，解决方法是在restapi.py 中用base64.b64decode 替换decodebytes。至少，它对我有用。
例如Mac OS X 中的位置:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyral/restapi.py
关于python - PyRal getAttachment，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49984802/