1. Why does the assignment-and-test in one line not allowed in
Python?
For example, while ((content = fd.readline()) != ):
Because Guido didn't write it that way? ;-)
And that may have been because it is such a common source of bugs.
So common in fact that many compilers now offer to emit a
On Tue, 25 Jan 2005, Gilbert Tsang wrote:
Hey you Python coders out there:
Being a Python newbie, I have this question while trying to write a
script to process lines from a text file line-by-line:
#!/usr/bin/python
fd = open( test.txt )
content = fd.readline()
while (content != ):
There's nothing that really technically prevents us from doing an
assignment as an expression, but Python's language designer decided that
it encouraged a style of programming that made code harder to maintain.
By making it a statement, it removes the possiblity of making a mistake
like:
