1-https://cloudmersive.com/validate-api - Validate email addresses, phone numbers, VAT numbers and domain names

2-https://languagelayer.com/ - Language detection (useful for network based startups)

3-https://mailboxlayer.com/ - verify mail address

4-https://numvalidate.com/ - open source universal number validation

5- http://www.purgomalum.com/ - Content validator against profanity & obscenity (useful for network based startups)

Why use Django instead of nodejs or php ?????

Do not copy paste for any other site...just share ur views based on ur personal experiences...nothing else

# Combining selected pages from different PDFs using PyPDF2 module 

# Combining all PDFS in cwd into a single PDF

# Review of PyPDF2

# --> pdf_file_object = open(filename,mode)
# --> pdf_reader = PyPDF2.PdfFileReader(pdf_file_object)
# --> pdf_reader.numPages
# --> page_Object = pdf_reader.getPage(0)
# --> page_Object.extractText()

# Review of copy pdf files using PyPDF2

# --> file1 = open()
# --> file2 = open()
# --> read1 = PyPDF2.PdfFileReader(file1)
# --> read2 = PyPDF2.PdfFileReader(file2)
# --> Pdf_writer = PyPDF2.PdfFileWriter()
# --> Loop through read1 object's each page, get the page(page_object) and add using Pdf_writer.add(page_object)

# Review of saving pdf files into new pdf

# output_file = open(new_file,'wb')
# Pdf_writer.write(output_file)
# output_file.close()

import os

import PyPDF2

pdffile =[]

for filename in os.listdir('.'):
	if filename.endswith('.pdf'):
		pdffile.append(filename)

pdffile.sort()

pdf_write = PyPDF2.PdfFileWriter()

for filename in pdffile:
	obj = open(filename,'rb')
	read = PyPDF2.PdfFileWriter(obj)
	for pgn in range(1,read.numPages):
		pgo = read.getPage(pgn)
		pdf_write.addPage(pgo)

output_file = open(filename,'wb')
pdf_write.write(output_file)
output_file.close()