Getting Attrbute error _exit_ when use "with" keyword

Question

I have passed .csv file to post request,

input_file = data.get('file', None)
with input_file as datasheet:
        header = datasheet.readline()

Always I am getting error on second line. Also my file type is Unicode thats why it again giving error on third line for readline()

Answer 1

>>> with "test1.html" as fp:
...    header = fp.readline()
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: __exit__
>>> 

How to Read file with with stament:

code:

>>> with open("test1.html") as fp:
...    header = fp.readline()
... 

Check file is exits or not before doing any process.

Use os module

Demo:

>>> os.path.isfile("test1.html")
True
>>> os.path.isfile("nofile.html")
False
>>> 

---

File Upload to server via post request in API testing using tastypie

fp = open("C:\sample_datasheet.csv", 'rb')
content = fp.read()
fp.close()

fd ={'file': "C:\sample_datasheet.csv", "content": content}
self.assertHttpOK(self.api_client.post('api of upload', format='json',\
org_id=2, content_type="multipart/form-data",\
data=fd))

and Save content from the data to server location in the view.