Python, For loop: How to append the TRUE value[i] in the next cells[i+1,i+2,..] until the condition become FALSE

Could someone help with a logical scheme in for loop statement in Python? I try to be more clear: i want to build a for loop cycle where if a condition is TRUE i want to append the same value for the next cells until another condition become TRUE.

For example:

list = []

for i in range(1,len(close)):
  
  # FIRST CONDITION:
  if (close.fast_ema[i-1] < close.slow_ema[i-1]  and close.fast_ema[i] > close.slow_ema[i]:
  
  list.append(close.close[i]) # i want to append close.close[i] for al the next cells i (i+1, i+2,...)
  #until the SECOND condition become TRUE. 
  
  # SECOND CONDITION:
  elif if (close.fast_ema[i-1] > close.int_ema[i-1] and close.fast_ema[i] > close.slow_ema[i]:
  list.append(close.close)

  else: ecc....

I'm not a python expert and I hope I was clear enough. Thank you in advance, and if someone decide to help me I will be very grateful.