python中的pdf流

Question

为什么在将PDF文件读入Python时，pdf流对象是否过早终止？为什么我可以在记事本等中打开pdf并使整个文件显示正常，但不能在Python中显示？我知道pypdf，pdfminer等。这纯粹是为了帮助我理解幕后发生的事情。

fp = open(r'E:Books\glu.pdf')
foo = fp.read()
print(foo)
%PDF-1.2
%âãÏÓ
%header, xref, etc omitted for clarity.

34 0 obj
<< 
/Type /Catalog 
/Pages 31 0 R 
>> 
endobj
69 0 obj
<< /S 274 /Filter /FlateDecode /Length 70 0 R >> 
stream
Hﾉb```f``éb`c`àd`àc@
%Stream is much longer, but always terminates prematurely. 

Answer 1

以二进制模式打开pdf文件：

fp = open(r'E:Books\glu.pdf','rb')
foo = fp.read()
print(foo)

#and don't forget to close the file
fp.close()