七牛云存储上传失败，python代码

Question

Traceback (most recent call last):
  File "D:/pyprojects/qiniu/demo.py", line 26, in <module>
    ret, info = put_file(token, key, localfile)
  File "D:\Python\python34\lib\site-packages\qiniu\services\storage\uploader.py", line 64, in put_file
    ret, info = _form_put(up_token, key, input_stream, params, mime_type, crc, progress_handler, file_name)
  File "D:\Python\python34\lib\site-packages\qiniu\services\storage\uploader.py", line 80, in _form_put
    url = config.get_default('default_zone').get_up_host_by_token(up_token) + '/'
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 30, in get_up_host_by_token
    up_hosts = self.get_up_host(ak, bucket)
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 49, in get_up_host
    bucket_hosts = self.get_bucket_hosts(ak, bucket)
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 71, in get_bucket_hosts
    bucket_hosts = self.get_bucket_hosts_to_cache(key)
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 91, in get_bucket_hosts_to_cache
    self.host_cache_from_file()
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 107, in host_cache_from_file
    path = self.host_cache_file_path()
  File "D:\Python\python34\lib\site-packages\qiniu\zone.py", line 124, in host_cache_file_path
    return home + "/.qiniu_pythonsdk_hostscache.json"
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

我用官方在github上得代码，我看源码是HOME环境变量没设置，这个怎么破？
我用的py3.4

Answer 1

官方的代码没有设置HOME变量是留给你自己设置自己对应的，其次，你可以查看官方接入文档说明。一般也就需要开发者的secretKey-通过鉴权。最后还是不能你可以去隔壁论坛问他们API的开发人员，一般都会帮助你解决的。

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七牛开发者文档-Python SDK使用指南：http://developer.qiniu.com/code/v7/sdk/python.html
七牛开发者论坛：https://segmentfault.com/qiniu

Answer 2

在自己环境里面也试了一下：
Windows10 64Bits
Python3.5.2
也会报这个问题，再手动添加一个环境变量HOME之后，此问题得到解决：

另外在Linux环境下也分别试了：
Python2.7.8和Python3.5.2
均未出现此问题。

Root Cause还是环境变量的问题：

def host_cache_file_path(self):
    home = os.getenv("HOME")
    # 如果环境变量不存在的话，home是None，导致报错
    return home + "/.qiniu_pythonsdk_hostscache.json"

在我的环境里，默认情况下：

• Linux

(py3env) [root@iZ94dn8i2nsZ py]# echo $HOME
/root

• Windows环境下没有设置HOME环境变量