How do I use tabs and spaces? (how to resolve error TabError: inconsistent)

[snippsat]

TypeError: a bytes-like object is required, not 'str'

When you make writer it's bytes because of wb.
Then nrow need to bytes as can not mix string and bytes one of the big changes when moving to Python 3 from 2.
So convert before write.

>>> nrow = 'hello world'
>>> type(nrow)
<class 'str'>
>>> nrow = nrow.encode() # Same as encode('utf-8')
>>> type(nrow)
<class 'bytes'>

The other way is to make like this with w and use encoding(default is utf-8),but should specify like this as eg OS can mess it some times.

ofile = open(self.ofname, "w", encoding='utf-8')
writer = csv.writer(ofile, delimiter=',',