old_contents: #!/usr/bin/env python3
  
  # Copyright (C) 2017 Bas Stottelaar <basstottelaar@gmail.com>
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  import pexpect
  import sys
  import os
  import re
  
  
  def testfunc(child):
      # RNG source
      child.sendline("source 0")
      child.sendline("seed 1337")
  
      child.sendline("fips")
      child.expect("Running FIPS 140-2 test, with seed 1337 using Tiny Mersenne Twister PRNG.")
      child.expect("Monobit test: passed")
      child.expect("Poker test: passed")
      child.expect("Run test: passed")
      child.expect("Longrun test: passed")
  
      child.sendline("dump 10")
      child.expect("1555530734")
      child.expect("2178333451")
      child.expect("2272913641")
      child.expect("3790481823")
      child.expect("3190025502")
      child.expect("798555366")
      child.expect("1918982324")
      child.expect("1550167154")
      child.expect("3454972398")
      child.expect("1034066532")
  
      child.sendline("entropy")
      child.expect(re.compile(r"Calculated 7\.994\d{3} bits of entropy from 10000 samples\."))
  
      # Constant source
      child.sendline("source 1")
      child.sendline("seed 1337")
  
      child.sendline("fips")
      child.expect("Running FIPS 140-2 test, with seed 1337 using constant value.")
      child.expect("- Monobit test: failed")
      child.expect("- Poker test: failed")
      child.expect("- Run test: failed")
      child.expect("- Longrun test: passed")
  
      child.sendline("dump 10")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
  
      child.sendline("entropy")
      child.expect(re.compile(r"Calculated 0\.017\d{3} bits of entropy from 10000 samples\."))
  
  
  if __name__ == "__main__":
      sys.path.append(os.path.join(os.environ["RIOTBASE"], "dist/tools/testrunner"))
      from testrunner import run
      sys.exit(run(testfunc))
  
new_contents: #!/usr/bin/env python3
  
  # Copyright (C) 2017 Bas Stottelaar <basstottelaar@gmail.com>
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  import sys
  import os
  import re
  
  
  def testfunc(child):
      # RNG source
      child.sendline("source 0")
      child.sendline("seed 1337")
  
      child.sendline("fips")
      child.expect("Running FIPS 140-2 test, with seed 1337 using Tiny Mersenne Twister PRNG.")
      child.expect("Monobit test: passed")
      child.expect("Poker test: passed")
      child.expect("Run test: passed")
      child.expect("Longrun test: passed")
  
      child.sendline("dump 10")
      child.expect("1555530734")
      child.expect("2178333451")
      child.expect("2272913641")
      child.expect("3790481823")
      child.expect("3190025502")
      child.expect("798555366")
      child.expect("1918982324")
      child.expect("1550167154")
      child.expect("3454972398")
      child.expect("1034066532")
  
      child.sendline("entropy")
      child.expect(re.compile(r"Calculated 7\.994\d{3} bits of entropy from 10000 samples\."))
  
      # Constant source
      child.sendline("source 1")
      child.sendline("seed 1337")
  
      child.sendline("fips")
      child.expect("Running FIPS 140-2 test, with seed 1337 using constant value.")
      child.expect("- Monobit test: failed")
      child.expect("- Poker test: failed")
      child.expect("- Run test: failed")
      child.expect("- Longrun test: passed")
  
      child.sendline("dump 10")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
      child.expect("1337")
  
      child.sendline("entropy")
      child.expect(re.compile(r"Calculated 0\.017\d{3} bits of entropy from 10000 samples\."))
  
  
  if __name__ == "__main__":
      sys.path.append(os.path.join(os.environ["RIOTBASE"], "dist/tools/testrunner"))
      from testrunner import run
      sys.exit(run(testfunc))
  
subject: fix flake8 F401 issue