Error in opening of file. Python

Question

I trying to open file and met some problem:

TypeError: coercing to Unicode: need string or buffer, NoneType found

Here is the code example:

a = open(fname, "rb").read(255)

Whats wrong with the code?

What is fname? Can you show some more code. The one preceeding this — sshashank124
– sshashank124, Commented Jun 27, 2014 at 12:59
You think that fname contains a string but in fact, the way you have structured your previous code, fname is somehow being assigned None. That is why we are asking to see some more code. — sshashank124
– sshashank124, Commented Jun 27, 2014 at 13:01
Yes, I'm checked it. Actually, fname really contain the None — pipsik
– pipsik, Commented Jun 27, 2014 at 13:06

Martijn Pieters · Accepted Answer · 2014-06-27 13:00:05Z

5

fname is None, not a string:

>>> open(None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: coercing to Unicode: need string or buffer, NoneType found

You'll have to fix how you set fname or explicitly guard against it being None.

answered Jun 27, 2014 at 13:00

Martijn Pieters

1.1m325 gold badges4.2k silver badges3.4k bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Error in opening of file. Python

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related