python合并多个pdf为一个pdf

        确保安装该库：

```

pip install PyPDF2

``` 

最新版

```

pip install --upgrade PyPDF2

```

查看版本号

```

pip show PyPDF2

```

import os
# 需要先下载PyPDF2
from PyPDF2 import PdfWriter, PdfFileReader

folder_path = '你存放文件的目录'
output_path = '需要存放的地址merged_file.pdf'

def get_files_in_directory(directory):
    file_list = []
    for root, directories, files in os.walk(directory):
        for file_name in files:
            file_path = os.path.join(root, file_name)
            file_list.append(file_path)
    return file_list

# 获取所有文件名
filenames = get_files_in_directory(folder_path)

# 除去目录中不是以pdf结尾的文件
filtered_list = [file for file in filenames if file.endswith('.pdf')]


merger = PdfWriter()

for pdf in filtered_list:
    merger.append(pdf)

merger.write(output_path)

merger.close()

如果报错：

```

Traceback (most recent call last):
  File "c:\Users\32658\Desktop\func_script\merge_pdf.py", line 28, in <module>
    merger.write(output_path)
  File "E:\Code\Python\Lib\site-packages\PyPDF2\_writer.py", line 986, in write
    stream = FileIO(stream, "wb")
             ^^^^^^^^^^^^^^^^^^^^

``` 

记得输出路径要:E:\desktop_files\数学要素.pdf

最后是你要输出的文件（名称，格式），而不只是文件路径。

more reading:

```

Installation — PyPDF2 documentation

```