On 12/3/2016 6:27 PM, Chris Angelico wrote:
On Sun, Dec 4, 2016 at 10:11 AM, Robert <rxjw...@gmail.com> wrote:
I just notice that there is a slash character (\) before the if line.
What is it for?
Yes, that's important. The entire line of code is:
plt.xlabel("$p$, probability of heads") \
if k in [0, len(n_trials) - 1] else None
The backslash means "this continues on the next line".
> The ternary conditional looks like this:
5 if 1 < 2 else 7
Since 1 < 2, this has the value of 5. If not, it would have the value 7.
But the expression result isn't even used. So this is better written:
matplotlib.pyplot.xlabel sets x-axis scaling, with no documented return
value.
http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.xlabel
If, as seems reasonable to assume, it returns None, the value of the
expression is 'None if x else None', which is to say, None.
if k in [0, len(n_trials) - 1]:
plt.xlabel("$p$, probability of heads")
--
Terry Jan Reedy
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