如何使用Python从二进制代码创建PDF文件？(How do I create a PDF file from a binary code using Python?)

 我试图用Python为每封电子邮件发送自己的PDF文件。 我能够发送自己的PDF文件的二进制代码，但我无法从这个二进制代码重建PDF文件。 
 
 以下是我如何获取PDF文件的二进制代码： 
 
file = open('code.txt', 'w')
for line in open('somefile.pdf', 'rb').readlines():
    file.write(str(line))
file.close()
 
 以下是我尝试从二进制代码创建PDF文件的方法： 
 
file = open('new.pdf', 'wb')
for line in open('code.txt', 'r').readlines():
    file.write(bytes(line))
file.close()
 
 然后我收到这个错误： 
 
 
 
 Traceback（最近的最后一次调用）：file.write（bytes（line））中的文件“something.py”，第3行TypeError：不带编码的字符串参数 
 
 
 我做错了什么？ 

I am trying to send myself PDF files per E-mail with Python. I am able to send myself the binary code of a PDF file, but I am not able to reconstruct the PDF file from this binary code.
 
Here is how I obtain the binary code of a PDF file:
 
file = open('code.txt', 'w')
for line in open('somefile.pdf', 'rb').readlines():
    file.write(str(line))
file.close()
 
Here is how I try to create a PDF file from the binary code:
 
file = open('new.pdf', 'wb')
for line in open('code.txt', 'r').readlines():
    file.write(bytes(line))
file.close()
 
I then recieve this error:
 
 
 
Traceback (most recent call last): File "something.py", line 3, in file.write(bytes(line)) TypeError: string argument without an encoding
 
 
What did I do wrong? 

原文：https://stackoverflow.com/questions/43019315