how to downgrade numpy

To downgrade numpy in C++, you would need to follow these steps:

1. Check the current version of numpy: First, you need to determine the current version of numpy installed on your system. This can be done by running the following command in your C++ code:

#include <iostream>
#include <numpy/version.h>

int main() {
    std::cout << "Current numpy version: " << NUMPY_VERSION << std::endl;
    return 0;
}

This code will output the current numpy version.

1. Uninstall the current numpy version: To downgrade numpy, you need to uninstall the current version first. The exact steps for uninstallation depend on the package manager you are using. For example, if you are using pip, you can run the following command in your C++ code:

#include <cstdlib>

int main() {
    std::system("pip uninstall numpy");
    return 0;
}

This code will uninstall the current numpy version using pip.

1. Install the desired numpy version: After uninstalling the current numpy version, you can install the desired version. Again, the installation steps depend on the package manager. If you are using pip, you can run the following command in your C++ code:

#include <cstdlib>

int main() {
    std::system("pip install numpy==<desired_version>");
    return 0;
}

Replace <desired_version> with the version number you want to install. For example, if you want to install numpy version 1.19.3, the command will be pip install numpy==1.19.3.

1. Verify the installation: To verify that the downgrade was successful, you can check the version of numpy again using the code from step 1. If the output matches the desired version, it means the downgrade was successful.

These steps should guide you through the process of downgrading numpy in C++. Let me know if you need any further assistance!