Tag: constructor

Why does pybind fail for functions without arguments?

c++ constructor constructor-overloading pybind11 python

I have an overloaded constructor in C++ (default + other). My automatically generated pybind code looks like this: When I delete the first constructor everything works fine. But for the first one I get this error: Does anyone know why this error is coming up and how to fix it? Edit: I am using a custom pybind generator. Answer Thanks

Python: Reassigning Object to Class with No Constructor Does Not Overwrite Dictionary Field

constructor dictionary overwrite python python-3.x

I’m using Python 3.9.1 and am confused how Python’s default constructor works. I have the below class with a Dictionary field and no Constructor. When I populate its Dictionary and then reassign my object to a new instance, the dictionary retains its existing value (this also happens for List fields): However, when I add a constructor, it works as expected:

Python: Why do I get an “unexpected keyword argument” error? [closed]

constructor keyword-argument python

Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 2 years ago. Improve this question

more than one constructor in a python class

click constructor oop python

I come from the Java programming language and I know that you can have more than one constructor there. My question now is: is that also possible in Python? My Problem: I have a class, where I have my help functions for my commands (implemented with click). These commands are not in the history class. Now my commands sometimes only

Init super with existing instance?

constructor inheritance python python-3.x super

Suppose I have: How do I correctly initialize the super class with the output of the super class method rather than init? My OOP background is in C++ and I am continually getting into these scenarios due to the ability to overload constructors in C++, so a workaround for this would be awesome. Answer @shx2’s answer works but wastefully/awkwardly creates

ValueError: DataFrame constructor not properly called

constructor dataframe python

I am trying to create a dataframe with Python, which works fine with the following command: but, when I try to get the data from a variable instead of hard-coding it into the data argument; eg. : I expect this is the same and it should work? But I get: Answer Reason for the error: It seems a string representation

Automatically-generated Python constructor

code-generation constructor data-members python

I have countless Python classes from various projects from SQLAlchemy (and a couple from Pygame as well), and I recently noticed a pattern in many of them: their constructors always went something like this: … whereby the only thing the constructor did was to transfer a set of positional arguments into an exactly identically named set of data members, performing