python - Glitch with code? -


i have code. if run works fine if follow instructions. want dummyproof when enter make troops , fix mistake error after fixing mistake when functions restarts itself.

please take , me fix it.

import time warriors = 100 def deploy(): #calls fighters front lines     amount = input('how many warriors send front lines?  limit %i warriors. keep in mind enemy invaders have been spotted inside base. must keep 10 warriors in base @ times. ' %(warriors))     try:         amount = int(amount)     except valueerror:         print('please use numbers.')         time.sleep(1.5)         deploy()     if amount <= warriors:         print (type(amount))     elif amount > warriors:         print("you can't send many warriors. have %i warriors." %(warriors))         time.sleep(1.5)         amount=0         deploy()     else:         print("you did wrong. try again.")         time.sleep(1.5)         deploy() fighters = deploy() warriors = warriors - fighters

you shouldn't use recursion (e.g. function calling repeatedly) try , validation. general examples of patterns this, canonical question start. in case might refactor slightly.

import time  warriors = 100   def deploy():     while true:         amount = input("...")  # text here         try:             amount = int(amount)         except valueerror:             print("please use numbers.")             # move time.sleep end         else:  # execute if try block succeeds             if amount > warriors:                 print("you can't send many warriors. "                       "you have %i warriors." % warriors)             else:                 # went right!                 print(type(amount))  # why doing this...?                 return amount  # did forget in sample code?         # if here: broke         time.sleep(1.5)

that said, kind of ugly since it's nested. remember zen: "flat better nested." let's refactor bit make new function validation us.

import time  warriors = 100   def int_less_than(prompt, ceil, type_error_msg=none,                   value_error_msg=none, callback=none):     """returns validated integer      input(prompt) must less ceil. print console std error msg     if none specified. if specify callback: run callback if     errors detected.     """      while true:         user_in = input(prompt)         try:             user_in = int(user_in)         except valueerror:             print(type_error_msg or "you must enter number")         else:             if user_in > ceil:                 print(value_error_msg or "you must enter number "                                          "less {}".format(ceil))             else:                 return user_in         if callback not none:             callback()  # lets insert time.sleep call  def deploy():     amount = int_less_than("how many warriors to...",                            warriors,                            callback=lambda: time.sleep(1.5))     return amount

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