Python while loop Syntax Error

Question

I am learning Python and while working on a simple while loop I get a syntax error but cannot figure out why. Below is my code and the error I get

products = ['Product 1', 'Product 2', 'Product 3']
quote_items = []
quote = input("What services are you interesting in? (Press X to quit)")
while (quote.upper() != 'X'):
    product_found = products.get(quote)
    if product_found:
        quote_items.append(quote)
    else:
        print("No such product")
    quote = input("Anything Else?")
print(quote_items)

I am using NetBeans 8.1 to run these. Below is the error I see after I type in Product 1:

What servese are you interesting in? (Press X to quit)Product 1
Traceback (most recent call last):
File "\\NetBeansProjects\\while_loop.py", line 3, in <module>
quote = input("What services are you interesting in? (Press X to quit)")
File "<string>", line 1
Product 1
SyntaxError: no viable alternative at input '1'

On a side note, lists do not have any get method: products.get(quote) will raise an error — Moses Koledoye
– Moses Koledoye, Commented Jul 21, 2016 at 18:36

Sam · Accepted Answer · 2016-07-21 18:45:56Z

in Python 3

products = ['Product 1', 'Product 2', 'Product 3']
quote_items = []
quote = input("What services are you interesting in? (Press X to quit)")
while (quote.upper() != 'X'):
    product_found = quote in products
    if product_found:
        quote_items.append(quote)
    else:
        print("No such product")
    quote = input("Anything Else?")
print(quote_items)

in Python 2

products = ['Product 1', 'Product 2', 'Product 3']
quote_items = []
quote = raw_input("What services are you interesting in? (Press X to quit)")
while (quote.upper() != 'X'):
    product_found = quote in products
    if product_found:
        quote_items.append(quote)
    else:
        print "No such product"
    quote = raw_input("Anything Else?")
print quote_items

this is because lists don't have the attribute '.get()' so you can use

value in list that will return a True or False value

Sam · Accepted Answer · 2016-07-21 18:36:18Z

1

Use raw_input instead of input. Python evaluates input as pure python code.

quote = raw_input("What services are you interesting in? (Press X to quit)")

answered Jul 21, 2016 at 18:36

Sam

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3 Comments

John Gordon Over a year ago

Not if he's using Python 3.

chepner Over a year ago

@JohnGordon Apparently he's not.

John Gordon Over a year ago

@chepner If he really is using Python 2, then I would have expected a different error from the user input of "Product 1".

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