Re: [Tutor] SSL Error
On Wed, 1 Aug 2018, Marc Tompkins wrote: On 01/08/18 05:07, Saket Mehrotra wrote: Hi I am also not using any Open SSL package. I have just added " import requests" in py file. And when I run the module I get the SSL package error ,not sure why. Give us the _whole_ error message, even the parts that look like they don't make any sense. For one thing, the traceback tells us exactly which line of code triggered the exception - and which file that line of code came from. From your description, it sounds like the error is being thrown by the requests module, but we can't tell. Also, before your "import requests" line, include these: import sys print(sys.version) After the "import requests" line, include this: print(requests.__version__) -- Terry Carroll carr...@tjc.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] Counting Items on a List associated w/ Index #
Hi there,
I wrote a function which is supposed to count the number of items on
each index #.
For starters, here's a list I created to test the function:
properties = ["mansion, modern, swimming_pool" , "mansion, historic,
air_conditioning", "penthouse, modern, whirlpool"]
# index 0 = property type
# index 1 = style
# index 2 = feature
Here's the function:
def feature_counter(input_lst, index, input_str):
num_elt = 0
output_lst = []
for row in input_lst:
split_row = row.split(",")
output_lst.append(split_row)
for each in output_lst:
if each[index] == input_str:
num_elt = num_elt + 1
return num_elt
This function returns the correct result when checking index 0:
print(feature_counter(properties, 0, "mansion"))
>>> 2
Weirdly, it returns the wrong result when checking index 1:
print(feature_counter(properties, 1, "modern"))
>>> 0
and index 2:
print(feature_counter(properties, 2, "swimming_pool"))
>>> 0
Can anyone advise what's wrong with my function?
Thanks,
Rafael
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Re: [Tutor] Counting Items on a List associated w/ Index #
On 03/08/18 12:14, Rafael Knuth wrote:
> I wrote a function which is supposed to count the number of items on
> each index #.
> For starters, here's a list I created to test the function:
>
> properties = ["mansion, modern, swimming_pool" , "mansion, historic,
> air_conditioning", "penthouse, modern, whirlpool"]
Storing multiple fields in a single string is nearly always
the wrong thing to do. It would be much easier to work with
tuples of three strings. Always try to make your data look
as much like what you are trying to model as possible.
However...
> def feature_counter(input_lst, index, input_str):
> num_elt = 0
> output_lst = []
> for row in input_lst:
> split_row = row.split(",")
By splitting on the comma you leave the prefix
space in place for the 2nd and 3rd items.
You need to strip() that off before using it.
> output_lst.append(split_row)
T^his is exactly the pattern that matches a list
comprehension so you could write all of the above as:
def feature_counter(input_lst, index, input_str):
num_elt = 0
output_lst = [row.split(',').strip() for row in input_lst]
And you wouldn't need to do it at all if you stored
the base data as tuples of strings...
> for each in output_lst:
> if each[index] == input_str:
> num_elt = num_elt + 1
> return num_elt
>
> This function returns the correct result when checking index 0:
>
> print(feature_counter(properties, 0, "mansion"))
2
>
> Weirdly, it returns the wrong result when checking index 1:
> and index 2:
>
> print(feature_counter(properties, 2, "swimming_pool"))
0
That's because of the leading spaces.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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