要从 CSV 文件读取数据，请使用 Python CSV 库。下面是一个示例：
import csv
# Open the CSV file for reading
with open("test.csv", "rt") as f:
# Create a CSV reader object
reader = csv.reader(f, delimiter=",", quotechar='"')
# Iterate over the rows in the CSV file
for row in reader:
print(row)要将数据写入 CSV 文件，还可以使用 Python CSV 库：
import csv
# Create a list of data to write to the CSV file
data = [
(1, "A towel", 1.0),
(42, " it says, ", 2.0),
(1337, "is about the most ", -1),
(0, "massively useful thing ", 123),
(-2, "an interstellar hitchhiker can have.", 3),
]
# Open the CSV file for writing
with open("test.csv", "wt") as f:
# Create a CSV writer object
writer = csv.writer(f, delimiter=",", quotechar='"')
# Write the data to the CSV file
writer.writerows(data)使用 CSV 时文件：
以下是示例代码的输出：
1,"A towel,",1.0 42," it says, ",2.0 1337,is about the most ,-1 0,massively useful thing ,123 -2,an interstellar hitchhiker can have.,3
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