savetxt() errors with python3

Here’s the error message. Should be easy to fix.

In [10]: sol.savetxt()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-10-fff6eb73d01a> in <module>
----> 1 sol.savetxt()

c:\users\berk\dropbox (mit)\mit graduate school\code\gpkit\gpkit\solution_array.py in savetxt(self, filename, printmodel, **kwargs)
    508         with open(filename, "w") as f:
    509             if printmodel and self.model:
--> 510                 f.write(str(self.model).encode("utf-8"))
    511             f.write(self.table(**kwargs).encode("utf-8"))
    512

TypeError: write() argument must be str, not bytes

Since GPkit claims to be python2/3 compatible, we should perhaps consider running tests for both versions to avoid future issues.

[bqpd]

(weekly ping)

[bqpd]

Let’s try and debug this on your computer early next week.