In my application I am receiving a string 'abc[0]=123'
I want to convert this string to an array of items. I have tried eval() it didnt work for me. I know the array name abc but the number of items will be different in each time.
I can split the string, get array index and do. But I would like to know if there is any direct way to convert this string as an array insert. I would greately appreciate any suggestion.
are you looking for something like
In [36]: s = "abc[0]=123"
In [37]: vars()[s[:3]] = []
In [38]: vars()[s[:3]].append(eval(s[s.find('=') + 1:]))
In [39]: abc
Out[39]: [123]
But this is not a good way to create a variable
Here's a function for parsing urls according to php rules (i.e. using square brackets to create arrays or nested structures):
import urlparse, re
def parse_qs_as_php(qs):
def sint(x):
try:
return int(x)
except ValueError:
return x
def nested(rest, base, val):
curr, rest = base, re.findall(r'\[(.*?)\]', rest)
while rest:
curr = curr.setdefault(
sint(rest.pop(0) or len(curr)),
{} if rest else val)
return base
def dtol(d):
if not hasattr(d, 'items'):
return d
if sorted(d) == range(len(d)):
return [d[x] for x in range(len(d))]
return {k:dtol(v) for k, v in d.items()}
r = {}
for key, val in urlparse.parse_qsl(qs):
id, rest = re.match(r'^(\w+)(.*)$', key).groups()
r[id] = nested(rest, r.get(id, {}), val) if rest else val
return dtol(r)
Example:
qs = 'one=1&abc[0]=123&abc[1]=345&foo[bar][baz]=555'
print parse_qs_as_php(qs)
# {'abc': ['123', '345'], 'foo': {'bar': {'baz': '555'}}, 'one': '1'}
Your other application is doing it wrong. It should not be specifying index values in the parameter keys. The correct way to specify multiple values for a single key in a GET is to simply repeat the key:
http://my_url?abc=123&abc=456
The Python server side should correctly resolve this into a dictionary-like object: you don't say what framework you're running, but for instance Django uses a QueryDict which you can then access using request.GET.getlist('abc') which will return ['123', '456']. Other frameworks will be similar.
In my application I am receiving a string 'abc[0]=123'. What sort of application is this, which receives an assignment statement?regex.