python installation numpy tutorial

The steps for python to install numpy are as follows: 1. Open the terminal and enter the "python --version" command to check whether Python is installed; 2. Enter the "pip install numpy" command on the command line to install NumPy; 3. , wait for the installation to complete, and a successful prompt message will appear.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Installing NumPy is very simple. You can install NumPy by following these steps:

1. Make sure you have Python installed. You can download and install Python from the official Python website (https://www.python.org).

2. Open a command line terminal (Command Prompt or PowerShell for Windows, Terminal for Mac).

3. Enter the following command at the command line to install NumPy:

pip install numpy

This will use the pip package manager to install NumPy from the Python Package Index (PyPI ) Download and install NumPy.

4. Wait for the installation to complete. Once the installation is complete, you will see a success message.

Now, you have successfully installed NumPy. You can import the NumPy module into your Python project and start using it.

The following is a simple example code that demonstrates how to create and manipulate arrays using NumPy:

import numpy as np

# 创建一个一维数组
arr1 = np.array([1, 2, 3, 4, 5])
print(arr1)  # 输出: [1 2 3 4 5]

# 创建一个二维数组
arr2 = np.array([[1, 2, 3], [4, 5, 6]])
print(arr2)
# 输出:
# [[1 2 3]
#  [4 5 6]]

# 使用 NumPy 函数创建一个数组
arr3 = np.zeros((2, 3))
print(arr3)
# 输出:
# [[0. 0. 0.]
#  [0. 0. 0.]]

# 对数组进行运算
arr4 = arr1 + arr2
print(arr4)
# 输出:
# [[2 4 6]
#  [5 7 9]]

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