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Assuming I've a JSON object like this:
var myObj = {
'question1': {
'option1': 'foo',
'option2': 'bar',
'option3': 'baz'
},
'question2': {
...
},
'question3': {
...
}
};
And since its children always has a number in its keys, I want to do a loop and concatenate the loop's index to the object keys, and get the values in the dot notation method...
So, I guess to get the values, I need to do some thing like this:
myObj.'question'+i
How can I do the concatenation right?
655
asked Nov 12 '16 15:11
To start, you may use this template to concatenate your column values (for strings only): df ['New Column Name'] = df ['1st Column Name'] + df ['2nd Column Name'] + ... Notice that the plus symbol (‘+’) is used to perform the concatenation.
We know that an object value can be accessed by using a Dot notation or Bracket notation. But we can also access the value using a variable key. Let's look over them in a nutshell. In the following example, object value is accessed using Dot and Bracket notation. Using a bracket notation is nothing but using a string key.
In this guide, I’ll show you how to concatenate column values in Python using pandas. To start, here is a template that you may use to concatenate column values in Python: df1 = df ['1st Column Name'] + df ['2nd Column Name'] + ... Notice that the plus symbol (‘+’) is used to perform the concatenation.
Notice that the plus symbol (‘+’) is used to perform the concatenation. Also note that if your data-set contains numbers, and you are trying to use the above template, you’ll get this error: ‘TypeError: ufunc ‘add’ did not contain a loop with signature matching types dtype (‘<U32’) dtype (‘<U32’) dtype (‘<U32′)’
Simply do
myObj['question'+i]
This is because the dot operator would not accept string with it as per javascript. So you will have to use square brackets instead which is often used to access properties of an object dynamically.
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