CODEWITHSUNDEEP
pythonbeautifulsouptype-conversion
learnerX
learnerX

Reputation: 1082

Grabbed numbers from an online page, converted to int(), but cannot multiply

I wrote a Python script that goes online, fetches a page, parses the page, locates a string of numbers (e.g, 5678), and stores it in num. Now, I need to perform some mathematical functions over this num. Why can't I do that?

Grabbed a line from page: The number is '6678'. Hence, line = "The number is '6678'"

c = ""
num = ''.join(c for c in line if c.isdigit())
int(num)
print num
try=(num*2)
print try

Error:

File "script", line 20
try=(num*2)
   ^
SyntaxError: invalid syntax

Edit: Changed the 'try' to 't'. Silly mistake! But, now I have a new error trying to do maths with 'num', further code:

new = (((num*3)+3)-1000)
print new

Error:

Traceback (most recent call last): File "602", line 22, in new = (((num*3)+2)-250) TypeError: coercing to Unicode: need string or buffer, int found

Upvotes: 0

Views: 87

Answers (3)

reticentroot
reticentroot

Reputation: 3682

This is a mock example. If you are using beautiful soup to return the html content of a page you would need you split the read content. You want to create a list of words not characters so you don't run into the whole 1 vs 12 issue @Jon Clements brought up.

my_list = []
for word in data.split(" "):
    if word.isdigit():
        my_list.append(word)
    my_list = [int(i) for i in my_list]
print sum(my_list) * 2

Also, this is how try works:

try:
    pass #try to do some action
except:
    pass #if that action fails report

Upvotes: 1

Aviv
Aviv

Reputation: 466

This error occurres because you're trying to use a variable named "try", which is a python's keyword. In addition, you didn't saved the integer value of the number. Finally, your code should looks like this:

line = "4567"
num = ''.join(c for c in line if c.isdigit())
int_num = int(num)
print int_num
try1=(int_num*2)
print try1

Upvotes: 1

Malik Brahimi
Malik Brahimi

Reputation: 16711

You need to actually reassign the casted number:

num = int(num) # num is a string right now

Upvotes: 1

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