Hello! In PHP array can be written as follows:

$array[$index]['example'] = "My text";

How to crank up a similar operation in Python?

  • one
    array[index]['example'] = "My text" - jfs
  • Explain the question, what exactly do you want to achieve? You need to store the value by key or by index, which thread is the combined options? Look at the Python book to the heights of excellence, literally on the first pages of a bunch of implementation options. - Igor Lavrynenko
  • I understand that this is a vector array containing dictionaries (heaps). You should have indicated this. - Mr. Fix
  • Related question: Python: How to get all values ​​by key from array - jfs

2 answers 2

If I understand the question correctly, then this is not possible in Python. You must first create a container, and then add elements to it. In PHP, exactly the same thing happens, but the interpreter hides it from you. For your example, the container will most likely be a list or dictionary. Container will be - two. As an element of the first container - the second container. You also need to create it first, and then add elements to it.

There are several options to do what you want. The specific option depends on the problem being solved.

The simplest thing is to present your data structure as nested dictionaries.

Option 1.

 some = dict() some[index] = dict() some['example'] = 'My text'

Option 2. The same can be written more succinctly:

 some = dict() some[index] = dict(example='My text')

Option 3. As far as I understand, index is a number. In this case, it cannot be slipped as an argument to the dict() constructor. But you can use the letter form of dictionaries.

 some = { index: { 'example': 'My text' } }

Option 4. It's all good, but what to do if you still need a list, not a dictionary.

 some = list() some += [dict(example='My text')]

Here we have created a list, and put a dictionary as its first element. "Unfortunately", the lists are numbered from "0", and then in order. Those. you can not fill in the elements "5", "10", "25", and the rest do not fill, as in PHP or Perl.

If there is only one item in the list, you can shorten it:

 some = [dict(example='My text')]

Option 5. I would suggest to look towards the collections . Perhaps the original task will be better placed on methods from this module.

Option 6. If you implement a list of data of a complex structure, then it is more correct to do this with classes. So it will be easier to control what is happening.

  • If there is no explicit requirement to emulate each bug in php, then array[index]['example'] = "My text" already be a sufficient answer (although it is not known what the author wants). One can guess for a long time what is needed: array = [{'example': 'My text'}] or array = vividict(); where vividict = lambda: collections.defaultdict(vividict) or array.append({'example': 'My text'}) or array[index] = d or something else - the word "impossible" should not be used, Moreover, we do not know the exact formulation of the problem. - jfs
  • @jfs I'm sure I understood what the original question was. In company N, they transplanted old burnt-out perlovikov in Python. And I literally heard similar questions every day. Obviously, comrades want to achieve familiar semantics, with the most familiar syntax, the most standard means of a language with the least amount of constructs. Bug \ no bug - a moot point. - Ilia w495 Nikitin
  • each language has its own idioms. You do not need to encourage writing the X language using the Y syntax (if you write on Y, then use the techniques adopted on Y). This topic for many years. As it is known: "the determined Real Programmer can write FORTRAN programs in any language." - jfs
  • How to act? Say, "go read something about the python." In my experience, this does not work. External structural-semantic similarity of idioms works as “false friends of a translator”. Sometimes it helps, sometimes it interferes. If someone stumbled about such friends, it seems to be better to talk about the difference, and if possible explain it. At least that was what I wanted in my answer. - Ilia w495 Nikitin
  • "how to act?" Step number 1 to clarify what the actual problem a person wants to solve Step number 2 to propose solutions suitable for the selected language. See options from my first comment. - jfs

The fact is that data types in different languages ​​use the same. The principles of working with them are also about the same.

Therefore, the answer will be: just like you wrote, only without a dollar sign .