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- import sys
- import os
- def clear_screen():
- os.system('cls' if os.name=='nt' else 'clear')
- def get_input(prompt, accept_blank=True):
- try:
- while True:
- response = raw_input(prompt)
- if response == "" and accept_blank==False:
- print("A response is required here.\n")
- else:
- return response
- except KeyboardInterrupt:
- print("\n\nExiting without saving changes.")
- sys.exit(1)
-
- def get_yes_no(prompt, yn_ok=True, default=None):
- """Ask the user a Yes or No question.
- yn_ok set to True will allow 'y' or 'n' response too.
- A default may be specified when the user just presses enter."""
- if not prompt.endswith(" "):
- prompt += " "
- while True:
- response = get_input(prompt).lower()
- if response == "yes":
- return True
- elif response == "y" and yn_ok:
- return True
- elif response == "no":
- return False
- elif response == "n" and yn_ok:
- return False
- elif response == "" and default != None:
- return default
- else:
- print("A Yes or No response is required.\n")
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