Develop Reference

Python Variable For Get Request?

I am trying to move over some API calls I had working over to python from postman, I am having some issues making a variable callable by my next get request. I've found a few things while searching but never found a 100% answer on how to call the environment variable in the get request...is it correct to use the {{TEST}} to call that var. Example below.
Test = Myaccoount
Json_Response_Test = requests.get('https://thisisjustatesttoaccessmyaccount/{{Test}}')
How can I carry over Test into the request?

Your code will almost work as you have it if you use the feature of newer version of Python called "format strings". These are denoted by a f at the beginning of the string. This works like this in such versions of Python:
Test = Myaccoount
Json_Response_Test = requests.get(f'https://thisisjustatesttoaccessmyaccount/{Test}')
as long as Myaccoount is a valid value that can be expanded by Python into the format string.
If you're using an older version of Python, you could do something like this:
Test = Myaccoount
Json_Response_Test = requests.get('https://thisisjustatesttoaccessmyaccount/{}'.format(Test))
BTW, it's not good form to use uppercase first character names for variables. The convention is to use uppercase only for class and type names, and use lowercase for variable and field names.

Django interpreting dict values ambiguously [duplicate]

In a Django view you can access the request.GET['variablename'], so in your view you can do something like this:
myvar = request.GET['myvar']
The actual request.GET['myvar'] object type is:
<class 'django.http.QueryDict'>
Now, if you want to pass multiple variables with the same parameter name, i.e:
http://example.com/blah/?myvar=123&myvar=567
You would like a python list returned for the parameter myvar, then do something like this:
for var in request.GET['myvar']:
print(var)
However, when you try that you only get the last value passed in the url i.e in the example above you will get 567, and the result in the shell will be:
5
6
7
However, when you do a print of request.GET it seems like it has a list i.e:
<QueryDict: {u'myvar': [u'123', u'567']}>
Ok Update:
It's designed to return the last value, my use case is i need a list.
from django docs:
QueryDict.getitem(key)
Returns
the value for the given key. If the
key has more than one value,
getitem() returns the last value. Raises
django.utils.datastructures.MultiValueDictKeyError
if the key does not exist. (This is a
subclass of Python's standard
KeyError, so you can stick to catching
KeyError
QueryDict.getlist(key) Returns the
data with the requested key, as a
Python list. Returns an empty list if
the key doesn't exist. It's guaranteed
to return a list of some sort.
Update:
If anyone knows why django dev's have done this please let me know, seems counter-intuitive to show a list and it does not behave like one. Not very pythonic!

You want the getlist() function of the GET object:
request.GET.getlist('myvar')

Another solution is creating a copy of the request object... Normally, you can not iterate through a request.GET or request.POST object, but you can do such operations on the copy:
res_set = request.GET.copy()
for item in res_set['myvar']:
item
...

When creating a query string from a QueryDict object that contains multiple values for the same parameter (such as a set of checkboxes) use the urlencode() method:
For example, I needed to obtain the incoming query request, remove a parameter and return the updated query string to the resulting page.
# Obtain a mutable copy of the original string
original_query = request.GET.copy()
# remove an undesired parameter
if 'page' in original_query:
del original_query['page']
Now if the original query has multiple values for the same parameter like this:
{...'track_id': ['1', '2'],...} you will lose the first element in the query string when using code like:
new_query = urllib.parse.urlencode(original_query)
results in...
...&track_id=2&...
However, one can use the urlencode method of the QueryDict class in order to properly include multiple values:
new_query = original_query.urlencode()
which produces...
...&track_id=1&track_id=2&...

Why is find_withtag wont work in python

This is part of my code, the id of image wont print even I use the withtag function. I think the function canvas.delete won't work is also the same problem, it seem the tag is inserted as "123","456". However, the tag I expected to use and get is 123 instead of '123'. And I guess it's the main problem I can't get the id I want with the findtag function.
CurrentImage=Note[NoteIndexLocal]
Temp=canvas.create_image(XShow,YShow,image=CurrentImage,tag=123)
print canvas.find_withtag(123) #This Wont Work,printed()
canvas.delete(123) #This Wont Work
print canvas.gettags(Temp) #printed '123'

From: http://effbot.org/tkinterbook/canvas.htm
Tags are symbolic names attached to items. Tags are ordinary strings,
and they can contain anything except whitespace (as long as they don’t
look like item handles).
Use str(123) instead of 123
EDIT: correct answer is in text from doc "as long as they don’t look like item handles". Number 123 looks like item handle (print Temp to see how it looks like) so it doesn't work. Use text like "a123" and it will work.

How come my template tag in Django doesn't work?

{% gen_aws "hello" %}
In my file, I do this:
#I want to add "goodbye" to every word passed to this tag.
#register.tag(name="gen_aws")
def gen_aws(s):
return s + "goodbye"
The .py file is fine...I'm including everything fine. I have other template "filters" in there that work fine. But then I added this in that file, and this template tag doesn't work.

Your description of "doesn't work" is not very accurate (to be exact it doesn't exist). But I guess you get an error because the tag is not found.
The documentation clearly states that you need a "templatetags" module in your app, with a submodule like "mytags", for example. Then you have to include these tags in each template you want to use them. You can do that with {% load mytags %}.
The "mytags" module then contains your "gen_aws" tag.
EDIT: The error "gen_aws() takes exactly 1 argument (2 given)" occurs because normal tags can parse their parameter in a very customized way. Therefore they get the arguments "parser" and "token". In your case, a so-called simple tag should be enough - Django then automatically parses parameters for you and passes them as Python values. So just replace #register.tag by #register.simple_tag.

Another possible cause of the "no attribute 'must_be_first'" error is that you've forgot to inherit from django.template.Node in your class. (Since this is pretty much the only Google result for that phrase I thought I'd add this here to save a couple of minutes for the next person.)

Creating views in django (string indentation problems)

I am new to both Python (and django) - but not to programming.
I am having no end of problems with identation in my view. I am trying to generate my html dynamically, so that means a lot of string manipulation. Obviously - I cant have my entire HTML page in one line - so what is required in order to be able to dynamically build an html string, i.e. mixing strings and other variables?
For example, using PHP, the following trivial example demonstrates generating an HTML doc containing a table
<?php
$output = '<html><head><title>Getting worked up over Python indentations</title></head><body>';
output .= '<table><tbody>'
for($i=0; $i< 10; $i++){
output .= '<tr class="'.(($i%2) ? 'even' : 'odd').'"><td>Row: '.$i;
}
$output .= '</tbody></table></body></html>'
echo $output;
I am trying to do something similar in Python (in my views.py), and I get errors like:
EOL while scanning string literal (views.py, line 21)
When I put everything in a single line, it gets rid of the error.
Could someone show how the little php script above will be written in python?, so I can use that as a template to fix my view.
[Edit]
My python code looks something like this:
def just_frigging_doit(request):
html = '<html>
<head><title>What the funk<title></head>
<body>'
# try to start builing dynamic HTML from this point onward...
# but server barfs even further up, on the html var declaration line.
[Edit2]
I have added triple quotes like suggested by Ned and S.Lott, and that works fine if I want to print out static text. If I want to create dynamic html (for example a row number), I get an exception - cannot concatenate 'str' and 'int' objects.

I am trying to generate my html dynamically, so that means a lot of string manipulation.
Don't do this.
Use Django's templates. They work really, really well. If you can't figure out how to apply them, do this. Ask a question showing what you want to do. Don't ask how to make dynamic HTML. Ask about how to create whatever page feature you're trying to create. 80% of the time, a simple {%if%} or {%for%} does everything you need. The rest of the time you need to know how filters and the built-in tags work.
Use string.Template if you must fall back to "dynamic" HTML. http://docs.python.org/library/string.html#template-strings Once you try this, you'll find Django's is better.
Do not do string manipulation to create HTML.
cannot concatenate 'str' and 'int' objects.
Correct. You cannot.
You have three choices.
Convert the int to a string. Use the str() function. This doesn't scale well. You have lots of ad-hoc conversions and stuff. Unpleasant.
Use the format() method of a string to insert values into the string. This is slightly better than complex string manipulation. After doing this for a while, you figure out why templates are a good idea.
Use a template. You can try string.Template. After a while, you figure out why Django's are a good idea.
my_template.html
<html><head><title>Getting worked up over Python indentations</title></head><body>
<table><tbody>
{%for object in objects%}
<tr class="{%cycle 'even' 'odd'%}"><td>Row: {{object}}</td></tr>
{%endfor%}
</tbody></table></body></html>
views.py
def myview( request ):
render_to_response( 'my_template.html',
{ 'objects':range(10) }
)
I think that's all you'd need for a mockup.

In Python, a string can span lines if you use triple-quoting:
"""
This is a
multiline
string
"""
You probably want to use Django templates to create your HTML. Read a Django tutorial to see how it's done.
Python is strongly typed, meaning it won't automatically convert types for you to make your expressions work out, the way PHP will. So you can't concatenate strings and numbers like this: "hello" + num.