I am new to python I need to convert this following function to the generator to save memory, how can I achieve that?
question = <QuerySet [<Question: foobar?.>]>
for index, question in enumerate(questions):
if question["pk"] == self.pk:
try:
next_question = questions[index + 1]
if next_question["pk"]:
prev_next.update({"next" : next_question["pk"] })
except IndexError:
prev_next.update({"complete" : True })
try:
if index > 0:
previous_question = questions[index - 1]
if previous_question["pk"]:
prev_next.update({"prev" : previous_question["pk"] })
except IndexError:
pass
return prev_next
Related
The data_get function retrieves a value from a nested array or object using "dot" notation:
$data = ['products' => ['desk' => ['price' => 100]]];
$price = data_get($data, 'products.desk.price');
// 100
More detail in Laravel Doc
I do this function:
def get_data(data, dot_path, default=None):
arr_paths = dot_path.split('.')
result = data
for path in arr_paths:
try:
if isinstance(result, (dict, list, tuple)):
result = result[path]
else:
result = None
except KeyError as e:
result = None
if not result:
result = default
return result
When i call the below function through API;
In both try and except conditions I have to keep log in separate table named api.log.
While the function enters in except condition, error occurs on creating record on api.log table
Here is the code:
#http.route('/tax_master',type="json",methodn ['POST'],auth="public",csrf=Falenter code herese)
def create_tax_master(self,**kw):
kw = http.request.params
obj_tax_master = request.env['tax.master']
obj_account_tax = request.env['account.tax']
flag = kw.get('flag')
vals = {}
result = False
if kw.get('name'):
vals['name'] = kw.get('name')
if kw.get('value'):
vals['value'] = kw.get('value')
if kw.get('scope'):
vals['scope'] = kw.get('scope')
if kw.get('is_excise'):
vals['is_excise'] = kw.get('is_excise')
if kw.get('description'):
vals['description'] = kw.get('description')
if kw.get('amount_type'):
vals['amount_type']= kw.get('amount_type')
if 'is_excise' in kw and kw.get('is_excise') not in [1,0]:
result = json.dumps({
"statusCode":02,
"statusDesc":"The value for the field is_excise should be 0 or 1"})
try:
if flag == 'create':
tax_id = obj_tax_master.sudo().create(vals).id
result = json.dumps({"id":tax_id,
"statusCode":01,
"statusDesc":"Successfully Created"
})
elif flag == 'write':
if kw.get('id'):
tax_id_rec = obj_tax_master.sudo().browse([int(kw.get('id'))])
if tax_id_rec.active == False:
result = json.dumps({
'statusCode': 02,
'statusDesc': 'The Tax is Archived.Updation is not possible now',
})
else:
tax_id_rec.sudo().write(vals)
tax_id = kw.get('id')
result = json.dumps({"id":tax_id,
"statusCode":01,
"statusDesc":"Successfully Updated"
})
else:
result = json.dumps({
'statusCode' : 02,
'statusDesc' : 'Please provide valid id to update the record',
})
elif flag == 'delete':
tax_id = obj_tax_master.sudo().browse(int(kw.get('id')))
if tax_id.active == False:
result = json.dumps({
'statusCode': 02,
'statusDesc': 'The record is already archived!!!',
})
else:
tax_id.write({'active':False})
taxes = obj_account_tax.sudo().search([('tax_master_id','=',kw.get('id'))])
for tax in taxes:
tax.write({'active':False})
result = json.dumps({
'statusCode' : 01,
'statusDesc' : 'The record is archived successfully!!!',
})
data = json.loads(result)
self.create_api_log('tax_master', flag, kw, data)
return data
except Exception,e:
result = json.dumps({'statusCode' : 02,'statusDesc' : str(e),})
data = json.loads(result)
self.create_api_log('tax_master', flag, kw, data)
return data
It is solved by using commit function.
I have respone object below
response = source.list_tags_for_resource(ResourceName=<ARN>)
taglistk = response['TagList']
print(taglistk)
output :
[{'Value': 'yes', 'Key': 'az'},{'Value': 'dba', 'Key': 'created'},{'Value': 'mariadb', 'Key': 'service'}]
Now I want to write an for if condition to match for only K,V az=yes and service=mariadb and do something
From the tag list of the response, pick a tag by for loop and check the values of given keys, i.e. Key and Value.
response = source.list_tags_for_resource(ResourceName=<ARN>)
for item in response:
if item['Key'] == 'az' and item['Value'] == 'yes':
# do something with item
elif item['Key'] == 'service' and item['Value'] == 'mariadb':
# do otherthing with item
else:
continue
I'm trying to use a string as a parameter in a function. Is something like this possible?
from django.contrib.auth.models import User
param_var = 'contains'
User.objects.filter(first_name__{param_var}='John')
# ideally, this should equate to:
User.objects.filter(first_name__contains='John')
param_var = 'contains'
User.objects.filter(**{'first_name__%s'%param_var: 'John'})
Though I really wonder about the wisdom of doing that... I think you may be re-inventing sql injection...
I suspect there's a better way. You should probably explain more of what you are trying to accomplish.
Solved:
# Something like this...
qs = User.objects.all()
parameters = {
'name': {
'type': 'get',
'filter': [
'first_name__icontains',
'last_name__icontains',
# ...
],
},
# ...
}
for parameter, data in parameters.items():
if data['type'] == 'get':
value = request.GET.get(parameter, None)
elif data['type'] == 'getlist':
value = request.GET.getlist(parameter)
if value:
query = Q()
for f in data['filter']:
query = query | Q(**{ f : value })
qs = qs.filter(query)
This is roughly what I'm trying to do:
def post(request):
VehicleFormSet = formset_factory(StaffVehicleForm)
if request.method == 'POST':
vehicle_formset = VehicleFormSet(request.POST)
if 'add_vehicle' in request.POST:
if vehicle_formset.is_valid():
form_count = vehicle_formset.total_form_count()
vehicle_formset.forms.append(vehicle_formset._construct_form(form_count))
Basically, if a user clicks the "Add" button and their entry is valid, I want to add another blank form to the formset, and hide the previous one.
The problem with the code above is that I can't figure out how to increase total_form_count(). The way I have it now, it will work once, and then if you press it again, nothing will happen, presumably because form_count is the same. I also don't like calling _construct_form and relying on the internals.
class RequiredFormSet(BaseFormSet):
def add_form(self, **kwargs):
# add the form
tfc = self.total_form_count()
self.forms.append(self._construct_form(tfc, **kwargs))
self.forms[tfc].is_bound = False
# make data mutable
self.data = self.data.copy()
# increase hidden form counts
total_count_name = '%s-%s' % (self.management_form.prefix, TOTAL_FORM_COUNT)
initial_count_name = '%s-%s' % (self.management_form.prefix, INITIAL_FORM_COUNT)
self.data[total_count_name] = self.management_form.cleaned_data[TOTAL_FORM_COUNT] + 1
self.data[initial_count_name] = self.management_form.cleaned_data[INITIAL_FORM_COUNT] + 1
def add_fields(self, form, index):
super(RequiredFormSet, self).add_fields(form, index)
form.empty_permitted = False
That will do it. Only took 7 hours to figure out. And I still don't know why I need .is_bound = False to make the initial values not screw up.
I do this using javascript. Since the formset renders three management fields
<input type="hidden" id="id_TOTAL_FORMS" value="1" name="TOTAL_FORMS">
<input type="hidden" id="id_INITIAL_FORMS" value="1" name="INITIAL_FORMS">.
<input type="hidden" id="id_MAX_NUM_FORMS" name="MAX_NUM_FORMS">
you can use javascript to increment the id_TOTAL_FORMS value, and just add in the extra fields. So I'd create my fieldset like this:
VehicleFormSet = modelformset_factory(StaffVehicleForm, extra = 0, max_num = None)
The tricky thing is to create the extra form fields in javascript. I usually use AJAX to fetch a new row from a custom view.
For posterity here is another way which works without JS (or alongside JS) and which does not require intimate knowledge of formset methods. Instead, you can just inspect the POST data and adjust it as if JS had done some work client-side. The following makes sure that there is always (at least) one empty form at the end of the formset:
def hsview( request):
HS_formset = formset_factory( HSTestForm, extra=3 )
prefix='XYZZY'
testinpost, empty = 'key', '' # field in the form and its default/empty value
extra=3
# I prefer to do the short init of unbound forms first, so I invert the usual test ...
if request.method != 'POST':
formset = HS_formset( prefix=prefix)
else:
# process POSTed forms data.
# pull all relevant things out of POST data, because POST itself is not mutable
# (it doesn't matter if prefix allows in extraneous items)
data = { k:v for k,v in request.POST.items() if k.startswith(prefix) }
#if there are no spare empty forms, tell it we want another form, in place of or extra to client-side JS
#don't want to crash if unvalidated POST data is nbg so catch all ...
try:
n = int( data[ prefix + '-TOTAL_FORMS'])
test = '{}-{}-{}'.format(prefix, n-1, testinpost)
#print(test)
test = data.get( test, empty)
except Exception:
test = 'bleagh'
# log the error if it matters enough ...
if test != empty:
data[ prefix + '-TOTAL_FORMS'] = n + 1
# now the usual formset processing ...
formset = HS_formset( data, prefix=prefix)
# other_form = OtherForm( request.POST)
if formset.is_valid():
...
I use RegEx in my Vue.js method:
addForm: function () {
this.count++
let form_count = this.count
form_count++
let formID = 'id_form-' + this.count
incremented_form = this.vue_form.replace(/form-\d/g, 'form-' + this.count)
this.formList.push(incremented_form)
this.$nextTick(() => {
let total_forms = document.getElementsByName('form-TOTAL_FORMS').forEach
(function (ele, idx) {
ele.value = form_count
})
})
},
delForm: function () {
if (this.count != 0) {
this.count--
let form_count = this.count
form_count++
let formID = 'id_form-' + this.count
this.formList.pop()
this.$nextTick(() => {
let total_forms = document.getElementsByName('form-TOTAL_FORMS').forEach
(function (ele, idx) {
ele.value = form_count
})
})
}
else return
},