Fun Crossword puzzle on Python part 4

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Across
  1. 1. In fonts, slant option can have value as _________
  2. 3. __________ are the end points of bidirectional communication channel.
  3. 5. Python exceptions are caught by the _________ keyword
  4. 6. Which of the following is not a layout manager?
  5. 8. _______ is the base class of all numerical calculations.
  6. 10. Which method is used to display the current working directory?
Down
  1. 2. Which of the following is not a file attribute?
  2. 4. _______________ is a protocol which handles sending and routing email between email server
  3. 7. _________ function is used to close file in python
  4. 9. Which widget is used to display set of line of text?