Python: create a pandas data frame from a list
DataFrame.from_records treats string as a character list. so it needs as many columns as length of string. You could simply use the DataFrame constructor.
list
AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
I am trying to remove the character ‘ from my string by doing the following This gives me the error AttributeError: ‘list’ object has no attribute ‘replace’ Coming from a php background I am unsure what the correct way to do this is?
Python Sets vs Lists
It depends on what you are intending to do with it. Sets are significantly faster when it comes to determining if an object is present in the set (as in x in s), but are slower than lists when it comes to iterating over their contents. You can use the timeit module to see which is faster for … Read more
How do I append lists in Prolog?
The code as you’ve posted it is (almost) OK. The order of clauses just needs to be swapped (in order to make this predicate definition productive, when used in a generative fashion): This defines a relationship between the three arguments, let’s say A, B and C. Your first line says, ” C is the result of appending A and B if A and C are non-empty lists, they both have … Read more
What is a list in Bash?
I have searched for a similar question here, but surprisingly could not find any. In GNU bash, there is (a construct? a structure? a data type?) called “arrays“. Arrays are well documented in the bash documentation, so I think that I understand the basics. But suddenly, in the documentation there also comes up the term … Read more
Converting Dictionary to List?
Your problem is that you have key and value in quotes making them strings, i.e. you’re setting aKey to contain the string “key” and not the value of the variable key. Also, you’re not clearing out the temp list, so you’re adding to it each time, instead of just having two items in it. To fix your code, try something like: You don’t need to copy … Read more
Remove all occurrences of a value from a list?
Functional approach: Python 3.x or Python 2.x
TypeError: unsupported operand type(s) for -: ‘list’ and ‘list’
You can’t subtract a list from a list. Simple way to do it is using numpy: You can also use list comprehension, but it will require changing code in the function:
C# List to string with delimiter
You can use String.Join. If you have a List<string> then you can call ToArray first: In .NET 4 you don’t need the ToArray anymore, since there is an overload of String.Join that takes an IEnumerable<string>. Results: John, Anna, Monica