给下面代码每一行给上注释

# This is a Python code with comments explaining each line
# Import the necessary library
import pandas as pd
# Read the CSV file and assign it to a variable
data = pd.read_csv('data.csv')
# Display the first 5 rows of the data
print(data.head())
# Create a new column with a calculated value
data['new_column'] = data['column1'] + data['column2']
# Save the updated data to a new CSV file
data.to_csv('updated_data.csv', index=False)

注释如下：

# 导入必要的库
import pandas as pd
# 读取 CSV 文件并将其赋值给一个变量
data = pd.read_csv('data.csv')
# 显示数据的前 5 行
print(data.head())
# 创建一个新列，其值为两个列之和
data['new_column'] = data['column1'] + data['column2']
# 将更新后的数据保存到新的 CSV 文件中
data.to_csv('updated_data.csv', index=False)