Version Check

Check Version

1. Using version

Check the installed NumPy version.

import numpy as np

def main():
    print(f"NumPy version: {np.__version__}")

if __name__ == "__main__":
    main()

Output:

NumPy version: 1.26.0

2. Command Line

Check version from terminal.

python -c "import numpy; print(numpy.__version__)"

Or using pip:

pip show numpy

3. Detailed Info

Get comprehensive build information.

import numpy as np

def main():
    print(np.show_config())

if __name__ == "__main__":
    main()

Verify Install

1. Basic Test

Verify NumPy works correctly.

import numpy as np

def main():
    # Create array
    a = np.array([1, 2, 3, 4, 5])

    # Basic operations
    print(f"Array: {a}")
    print(f"Sum: {a.sum()}")
    print(f"Mean: {a.mean()}")

    print("NumPy is working!")

if __name__ == "__main__":
    main()

2. Matrix Operations

Test linear algebra functionality.

import numpy as np

def main():
    A = np.array([[1, 2], [3, 4]])
    b = np.array([5, 6])

    # Matrix multiplication
    result = A @ b
    print(f"Matrix multiply: {result}")

    # Determinant
    det = np.linalg.det(A)
    print(f"Determinant: {det}")

    print("Linear algebra working!")

if __name__ == "__main__":
    main()

3. Random Generation

Test random number generation.

import numpy as np

def main():
    np.random.seed(42)

    samples = np.random.randn(5)
    print(f"Random samples: {samples}")

    print("Random generation working!")

if __name__ == "__main__":
    main()

Troubleshooting

1. Import Error

If NumPy is not found:

# Check if installed
pip list | grep numpy

# Reinstall if needed
pip uninstall numpy
pip install numpy

2. Version Mismatch

If you need a different version:

import numpy as np

def main():
    required = "1.24.0"
    installed = np.__version__

    print(f"Required: {required}")
    print(f"Installed: {installed}")

    # Compare versions
    from packaging import version
    if version.parse(installed) < version.parse(required):
        print("Upgrade needed!")

if __name__ == "__main__":
    main()

3. Multiple Pythons

Ensure correct Python environment:

# Check which Python
which python

# Check which pip
which pip

# They should match
python -c "import sys; print(sys.executable)"