[Tutor] Count for loops
Alan Gauld
alan.gauld at yahoo.co.uk
Mon Apr 3 10:52:20 EDT 2017
On 03/04/17 13:22, Rafael Knuth wrote:
> with open (file_path) as a:
> b = a.read()
>
> get_year = input("What year were you born? ")
>
> for year in b:
Can you explain what you think this loop line is doing?
I'm pretty sure it's not doing what you expect.
> if get_year in b:
> print("Your year of birth occurs in PI!")
> break
> else:
> print("Your year of birth does not occur in PI.")
> break
>
> As a next challenge, I wanted to check how often a person's birth year
> occurs in PI. Unfortunately, I wasn't able to figure out how to use
> the loop count properly.
What loop count?
There is none, its a for loop, no counter needed.
(OK I just spotted your code below...)
But there is a count() method on a string object that should help.
> count = 0
> for year in b:
> if get_year in b:
> count += 1
> else:
> print("Your birth date does not occur in PI.")
> break
> sum_count = sum(count)
sum() sums a sequence, but count is an integer. You have been
incrementing it as you go, the final value is already there.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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