readers.file_reader: base file reading utilities

class BaseReader(obj)

Common base for FileReader and ZipReader. In fact, it is a very thin wrapper around IO-alike object, to read it line by line and:

• strip lines transparently

• ignore BOM (byte-order mark) at the beginning

• yield line with its number (1-based)

• support encoding change on the fly:

  for line in reader:
      # do something
      reader.reset_encoding('UTF-8')
      # ..continue to read from the same line
  

class FileReader(path, encoding='Windows-1252')

Reader implementation for simple filesystem file.

class ZipReader(zip_obj, encoding='Windows-1252')

Reader implementation for file inside zip archive.