解释这段代码with open('data.csv', 'w', encoding='utf-8', newline='') as f: writer = csv.writer(f) writer.writerows(rows)
时间: 2024-01-27 09:03:03 浏览: 24
这段代码使用Python的CSV模块,将一个二维数组(rows)写入到一个名为"data.csv"的CSV文件中。
- "with open('data.csv', 'w', encoding='utf-8', newline='') as f:" :打开名为"data.csv"的文件,并用utf-8编码格式写入,同时设置换行符为空。
- "writer = csv.writer(f)" :创建一个CSV写入器,将其与文件对象对应。
- "writer.writerows(rows)" :将二维数组rows写入到CSV文件中。其中,writerows()方法用于多行写入,而writerow()方法用于单行写入。
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with open('data.csv', 'w', encoding='utf-8', newline='') as f: writer = csv.writer(f) writer.writerows(rows)
This code snippet opens a file named "data.csv" in write mode with UTF-8 encoding and no newlines. It then creates a CSV writer object and writes the list of rows to the file using the writerows() method. Each row in the list is written as a separate line in the CSV file, with each value separated by a comma. This code is useful for saving data in a CSV format that can be easily read by spreadsheet applications or other programs.
def writer_csv(data_list): # ''' # 将爬取的数据存储到 data.csv 文件 # ''' # with open('data.csv', 'a+', newline='', encoding='utf-8-sig') as f: # writer = csv.writer(f) # writer.writerow(data_list)
这是一个 Python 函数,用于将数据列表写入到 CSV 文件中。函数名称为 `writer_csv`,它接受一个参数 `data_list`,即要写入的数据列表。
函数的具体实现如下所示:
```python
import csv
def writer_csv(data_list):
'''
将爬取的数据存储到 data.csv 文件
'''
with open('data.csv', 'a+', newline='', encoding='utf-8-sig') as f:
writer = csv.writer(f)
writer.writerow(data_list)
```
具体来说,函数通过 `csv` 模块打开名为 `data.csv` 的文件,打开模式为追加(`a+`),并指定编码为 `utf-8-sig`。然后,创建一个 `csv.writer` 对象,用于写入数据。最后,将数据列表 `data_list` 写入到文件中。由于我们指定了 `newline=''`,因此在写入数据时不会自动添加行末标识符,这需要我们手动确保数据列表中每个元素之间用逗号隔开,每行数据之间用换行符隔开。