Mahmoud Abdel-Fattah wrote:
Hello,
I'm coming from PHP background ant totally new to Python, I just
started using scrapy, but has some generic question in python.
1. How can I write the following code in easier way in Python ?
if len(item['description']) > 0:
item['description'] = item['description'][0]
else:
item['description'] = ''
In PHP I can write it as follows :
$item['description'] = (len(item['description']) > 0)
? item['description'][0] : '';
So, is there similar way in Python ?
2. How can I check if this variable defined or not, in PHP I can use
isset();, in other way, how can I make the following syntax in Python ?
$variable = isset($array['element']) ? true : false;
Thanks a lot,
Mahmoud
1. item['description'] = item.get('description', '')[1:] # access to a
dict with a default value if the key does not exist, then slice the result
2. if we're talking about dictionnaries, then you can test easily writing
if 'description' in item :
pass # whatever
It works in python with any iterable.
Cheers,
JM
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