我正在使用Dropbox api上传这样的文件:
token = 'This is the token'
file_name = 'This is the file_name'
headers = {
"Authorization": "Bearer {}".format(token),
"Content-Type": "application/octet-stream",
"Dropbox-API-Arg": "{\"path\":\"/my/path/my-file-name\",\"mode\":{\".tag\":\"overwrite\"}}"
}
data = open("my-file-name", "rb").read()
r = requests.post(url, headers=headers, data=data)
问题是,每当我运行此文件时文件名都会更改,因此我需要执行以下操作:
headers = {
"Authorization": "Bearer {}".format(token),
"Content-Type": "application/octet-stream",
"Dropbox-API-Arg": "{\"path\":\"/my/path/{}\",\"mode\":{\".tag\":\"overwrite\"}}".format(file_name)
}
但是当我这样做时,我收到错误:
Traceback (most recent call last):
File "headertest.py", line 6, in <module>
"Dropbox-API-Arg": '{"path":"/my/path/{}","mode":{".tag":"overwrite"}}'.format(file_name)
KeyError: '"path"'
[使用。format时,您需要将字符串中的赞美加倍,例如:{{}}。基本上{{等价于反斜杠,以引起引号,例如:\“。您的代码应如下所示:
s = '{{\"path\":"/my/path/{}","mode":{{".tag":"overwrite"}}}}'.format(file_name)
您已将{}
嵌套在json字符串中。您应该首先创建一个普通的dict
并将其放入其中。然后将file_name
放入您的标头字典中。
json.dumps()
输出:
token = 'abc'
file_name = 'This is the file_name'
arg_dict = {"path":"/my/path{}".format(file_name),"mode":{"tag":"overwrite"}}
arg_s = json.dumps(arg_dict)
headers = {
"Authorization": "Bearer {}".format(token),
"Content-Type": "application/octet-stream",
"Dropbox-API-Arg": arg_s
}
print(headers)