我在一个使用 pyPdf 编辑 Pdfs 的小程序上遇到了一些问题。我试图将 pdf 的最后一页(self.lastpage)作为默认参数传递给类方法(pageoutput)当我这样做时,我收到以下错误:
Traceback (most recent call last):
File "C:\Census\sf1.py", line 5, in <module>
class PdfGet():
File "C:\Census\sf1.py", line 35, in PdfGet
def pageoutput(self,outfile,start_page=0,end_page=self.lastpage):
NameError: name 'self' is not defined
如果我只是指定一个数字作为 end_page 它可以工作,但如果我使用属性它会失败。这个错误对我来说是一个神秘的赌注。pypdf 似乎没有问题,因为我可以毫无问题地打印 pdf 的最后一页。对于正在发生的事情,我将不胜感激!
这是我的代码(如果重要的话,我使用的是 pypdf 的 3.x 兼容版本):
from pyPdf import PdfFileWriter, PdfFileReader
import re
import time
class PdfGet():
def __init__(self):
self.initialize()
def initialize(self):
while True:
raw_args = input('Welcome to PdfGet...\n***Please Enter Arugments (infile,outfile,start_page,end_page) OR type "quit" to exit***\n').strip()
if raw_args.lower() == 'quit':
break
print("Converting Pdf...")
self.args = re.split(r',| ',raw_args)
self.opener(*self.args[0:1])
if len(self.args)== 4:
self.pageoutput(*self.args[1:])
elif len(self.args) == 3:
self.pageoutput(*self.args[1:3])
else:
self.pageoutput(*self.args[1:2])
print("Successfuly Converted!")
nextiter = input('Convert Another PDF? (Type "yes" or "no")').lower()
if nextiter == 'no':
break
def opener(self,infile):
self.output = PdfFileWriter()
self.pdf = PdfFileReader(open(infile, "rb"))
self.pagenum = self.pdf.getNumPages()
self.lastpage = self.pagenum+1
print(self.lastpage)
def pageoutput(self,outfile,start_page=0,end_page=self.lastpage):
for i in range (int(start_page)-1,int(end_page)):
self.output.addPage(self.pdf.getPage(i))
outputStream = open(outfile, "wb")
self.output.write(outputStream)
outputStream.close()
if __name__ == "__main__":
PdfGet()
time.sleep(5)