I have some .pdf files with more than 500 pages, but I need only a few pages in each file. It is necessary to preserve document`s title pages. I know exactly the numbers of the pages that program should remove. How I can do it using Python 2.7 Environment, which is installed upon MS Visual Studio?

Try using PyPDF2.

Instead of deleting pages, create a new document and add all pages which you don't want to delete.

Some sample code (originally adapted from BinPress which is dead, archived here).

from PyPDF2 import PdfWriter, PdfReader
pages_to_keep = [1, 2, 10] # page numbering starts from 0
infile = PdfReader('source.pdf', 'rb')
output = PdfWriter()

for i in pages_to_keep:
    p = infile.pages[i] 
    output.add_page(p)

with open('newfile.pdf', 'wb') as f:
    output.write(f)

or

from PyPDF2 import PdfWriter, PdfReader
pages_to_delete = [3, 4, 5] # page numbering starts from 0
infile = PdfReader('source.pdf', 'rb')
output = PdfWriter()

for i in range(len(infile.pages) ):
    if i not in pages_to_delete:
        p = infile.get_page(i)
        output.add_page(p)

with open('newfile.pdf', 'wb') as f:
    output.write(f)